Why do monsters wander?

Two things inspired me to create my own wandering monster chart:

1) The random Countryside Encounters from Better Than Any Man add to the overall story, rather than just spring monster after monster on a weakened party.  The list includes terrain features and "harmless" NPCs in addition to some monsters.  This has been great fun to use in my campaign and keeps us all on our toes.

2) The Sad Tale of the Brothers Grossbart was recommended here and I heartily second that.  The encounters the brothers experience are more murky and complex than just finding a monster and killing it.  Additionally, it shows how monster encounters could play out in a more interesting way than just rolling initiative and entering combat.

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It seems like the original goals of wandering monster charts were to punish reckless PCs, create tension between resting and pushing on, or to drain resources from a powerful party before they enter a dungeon.  Those purposes may still be used, but the primary purpose of this chart will be to create randomized encounters that add to the campaign world.

In Pathfinder, the encounters are meticulously planned and balanced, so there is no need for a wandering monster chart.  Therefore, this chart will primarily be used in Lamentations of the Flame Princess (and hopefully will be useful for other OSR games).

My ideal may not be possible, but I would like a single chart with 1000 different possible encounters.  I would like to have modifiers for three different states applicable to the party:

Location: wilderness / rural / urban
Vision: pitch black / dark (night) / light (day)
Behavior: reckless+noisy / relaxed+quiet / vigilant+silent

In general, the more deadly encounters should take place in the wilderness, pitch black or dark, and when they party is being reckless.  (This actually does serve to punish them.)  As you move to the other end of the spectrum, the encounters will become more mundane.

This chart should be usable everywhere (in a dungeon, farmhouse, town, the woods, mountains, etc.)  The Referee will just have to adjust the encounter for it to make sense (or, perhaps play it as is to add to the weirdness and creepiness of it - like finding a lone, healthy child in a deep, dark dungeon).

Finally, when a monster or NPC is rolled, I'd love to also have some sort of chart to detail its motivations, as seen at Telecanter's Receding Rules, 1d8 and Dreams in the Lich House.  I will try to develop something that combines their various ideas.

Something that isn't necessary for my chart is detailing HD (like Grognardling).  This is something that could be determined when the encounter is rolled.  Even though I'll be doing my chart differently, I'll probably include many of his monsters, since it's a good collection.

Below is my first draft.  Note that it has less than 200 encounters, only uses two of the three modifiers, and doesn't feature any terrain encounters.  I have a lot of work to do!  But first I'm interested in hearing ideas and feedback before I take the time to do that work.  Also, are there any glaring holes of monster/encounter categories?  (Keeping in mind the setting of LotFP - I'm avoiding most humanoids and generic high fantasy monsters.)

I'm planning to add: oozes, slimes, fungi, flocks of various birds, weather, events, monster combos (rolling twice on the chart), animated objects, domestic and farm animals, and a variety of mundane humans of different occupations.

(And one point of clarification - dark really means night.  The party can still have torches, lanterns, a campfire, etc., and have it count as "dark.")

Conditions of location:	Modifier to die roll:
Pitch Black Wilderness	+0
Pitch Black Rural	+20
Pitch Black Urban	+116
Dark Wilderness	+10
Dark Rural	+20
Dark Urban	+116
Light Wilderness	+94
Light Rural	+94
Light Urban	+116

1	It is pitch black.  You are likely to be eaten by a grue.	Pitch black	Wilderness
2-10	Random Esoteric Monster (party level X 2)	Pitch Black	Wilderness
11-20	Random Esoteric Monster (party level +2HD)	Dark	Wilderness
21	Vampire (Inhuman): blood	Dark	Rural
22	Vampire (Human): blood	Dark	Rural
23	Vampire (Inhuman): life energy	Dark	Rural
24	Vampire (Human): life energy	Dark	Rural
25	Vampire (Inhuman): emotions	Dark	Rural
26	Vampire (Human): emotions	Dark	Rural
27	Vampire (Inhuman): dreams	Dark	Rural
28	Vampire (Human): dreams	Dark	Rural
29	Vampire (Inhuman): soul	Dark	Rural
30	Vampire (Human): soul	Dark	Rural
31	Skinwalker: Exotic Animal	Dark	Rural
32	Skinwalker: Deer	Dark	Rural
33	Skinwalker: Badger	Dark	Rural
34	Skinwalker: Otter	Dark	Rural
35	Skinwalker: Hare	Dark	Rural
36	Skinwalker: Fox	Dark	Rural
37	Skinwalker: Bear	Dark	Rural
38	Skinwalker: Auroch	Dark	Rural
39	Skinwalker: Rat	Dark	Rural
40	Skinwalker: Boar	Dark	Rural
41	Skinwalker: Wolf (werewolf)	Dark	Rural
42	Spirit: Funnel	Dark	Rural
43	Spirit: Shadow	Dark	Rural
44	Spirit: Apparition (humanoid)	Dark	Rural
45	Spirit: Will-O-Wisp	Dark	Rural
46	Spirit: Ectomist	Dark	Rural
47	Spirit: Ball of Light	Dark	Rural
48	Spirit: Poltergeist	Dark	Rural
49	Spirit: Banshee	Dark	Rural
50	Demon: Lord	Dark	Rural
51	Demon: Nightmare	Dark	Rural
52	Demon: Ala	Dark	Rural
53	Demon: Tormenter	Dark	Rural
54	Demon: Succubus	Dark	Rural
55	Demon: Incubus	Dark	Rural
56	Demon: Possession	Dark	Rural
57	Demon: Trickster	Dark	Rural
58	Demon: Tempter	Dark	Rural
59	Demon: Pestilence	Dark	Rural
60	Possessed: Exotic Animal	Dark	Rural
61	Possessed: Deer	Dark	Rural
62	Possessed: Badger	Dark	Rural
63	Possessed: Otter	Dark	Rural
64	Possessed: Hare	Dark	Rural
65	Possessed: Fox	Dark	Rural
66	Possessed: Bear	Dark	Rural
67	Possessed: Auroch	Dark	Rural
68	Possessed: Rat	Dark	Rural
69	Possessed: Boar	Dark	Rural
70	Possessed: Wolf	Dark	Rural
71	Possessed: Human	Dark	Rural
72	Exotic Animal of Unusual Size	Dark	Rural
73	Human of Unusual Size	Dark	Rural
74	Hare of Unusual Size	Dark	Rural
75	Fox of Unusual Size	Dark	Rural
76	Bear of Unusual Size	Dark	Rural
77	Auroch of Unusual Size	Dark	Rural
78	Rat of Unusual Size	Dark	Rural
79	Badger of Unusual Size	Dark	Rural
80	Deer of Unusual Size	Dark	Rural
81	Otter of Unusual Size	Dark	Rural
82	Wolves of Unusual Size	Dark	Rural
83	Boars of Unusual Size	Dark	Rural
84	Exotic Animal	Dark	Rural
85	Hare	Dark	Rural
86	Fox	Dark	Rural
87	Bear	Dark	Rural
88	Auroch	Dark	Rural
89	Rat	Dark	Rural
90	Badger	Dark	Rural
91	Deer	Dark	Rural
92	Otter	Dark	Rural
93	Wolf	Dark	Rural
94	Boar	Dark	Rural
95-105	Random Esoteric Monster (party level)	Light	Rural
106	Manticore (traditional, not high fantasy version)	Light	Rural
107	Witch	Light	Rural
108	Siren	Light	Rural
109	Wasp of Unusual Size	Light	Rural
110	Ant of Unusual Size	Light	Rural
112	Beetle of Unusual Size	Light	Rural
113	Spider of Unusual Size	Light	Rural
114	Fly of Unusual Size	Light	Rural
115	Moth of Unusual Size	Light	Rural
116	Exotic Insect of Unusual Size	Light	Rural
117	Swarm of Ants	Light	Urban
118	Swarm of Bees	Light	Urban
119	Swarm of Beetles	Light	Urban
120	Swarm of Moths	Light	Urban
121	Swarm of Spiders	Light	Urban
122	Swarm of Flies	Light	Urban
123	Swarm of Exotic Insects	Light	Urban
124	Swarm of Random, Mixed Insects	Light	Urban
125	Tongue-Eating Louse	Light	Urban
126	Parasite: Mindworm	Light	Urban
127	Parasite: Infiltrator Spore	Light	Urban
128	Parasite: The Real Earwig	Light	Urban
129	Parasite: minor (botfly, tapeworm, etc.)	Light	Urban
130	Disease	Light	Urban
131	Secret Door	Light	Urban
132	Homunculi	Light	Urban
133	Mimics	Light	Urban
134	Local legend (Cryptid)	Light	Urban
135-140	Cult	Light	Urban
141	Cannibals	Light	Urban
142-150	Local Travelers	Light	Urban
151-155	Foreigners	Light	Urban
156	Knight of Science	Light	Urban
157-160	Thieves	Light	Urban
161	Adventurer: Cleric	Light	Urban
162	Adventurer: Fighter	Light	Urban
163	Adventurer: Magic-User	Light	Urban
164	Adventurer: Specialist	Light	Urban
165-199	Random Esoteric Monster (below party level)	Light	Urban