But only when when I'm out in the wilderness (makes sense really).

I assume it is some kind of incompatibility but this mod has always caused crashes no matter how many or few mods I have had installed. I've never managed to get this mod on without it causing a crash rather soon.

Does anyone have any ideas why this is happening? Does it sound like incompatibility with another mod?

Oblivion.esm
All Natural Base.esm
Francesco's Leveled Creatures-Items Mod.esm
Francesco's Optional New Items Add-On.esm
Better Cities Resources.esm
Unofficial Oblivion Patch.esp
DLCShiveringIsles.esp
Unofficial Shivering Isles Patch.esp
Better Cities .esp
Natural_Habitat_by_Max_Tael.esp
All Natural.esp
All Natural - SI.esp
Immersive Interiors.esp
Natural_Water_by_Max_Tael.esp
Cities Alive At Night.esp
WindowLightingSystem.esp
Book Jackets Oblivion.esp
ES4_Alchemists Reference.esp
ReneersNotesMod.esp
FormID Finder4.esp
DLCHorseArmor.esp
DLCHorseArmor - Unofficial Patch.esp
DLCOrrery.esp
DLCOrrery - Unofficial Patch.esp
DLCVileLair.esp
DLCVileLair - Unofficial Patch.esp
DLCMehrunesRazor.esp
DLCMehrunesRazor - Unofficial Patch.esp
DLCSpellTomes.esp
Adonnays Elven Weaponry.esp
AlternativeLightArmors12.esp
Dragon Knight Armor v. 1.1.esp
Slof's Horses Base.esp
Slof's Extra Horses.esp
Dude Wheres My Horse.esp
DLCThievesDen.esp
DLCThievesDen - Unofficial Patch.esp
DLCThievesDen - Unofficial Patch - SSSB.esp
Francesco's Optional Chance of Stronger Bosses.esp
Francesco's Optional Chance of Stronger Enemies.esp
Francesco's Optional Dungeon Chest Loot.esp
Francesco's Optional Dungeon Chest Locks.esp
Francesco's Optional Leveled Guards.esp
Francesco's Optional House Chest Loot.esp
Francesco's Optional New Adventurers.esp
Francesco's Optional Leveled Arena.esp
Francesco's Optional Files.esp
Alluring Potion Bottles v3.esp
Alluring Wine Bottles.esp
DLCBattlehornCastle.esp
DLCBattlehornCastle - Unofficial Patch.esp
DLCFrostcrag.esp
DLCFrostcrag - Unofficial Patch.esp
Knights.esp
Knights - Unofficial Patch.esp
xuldarkforest.esp
xulStendarrValley.esp
xulTheHeath.esp
XulEntiusGorge.esp
xulFallenleafEverglade.esp
xulColovianHighlands_EV.esp
xulChorrolHinterland.esp
xulBeachesOfCyrodiilLostCoast.esp
xulBravilBarrowfields.esp
xulLushWoodlands.esp
xulAncientYews.esp
xulAncientRedwoods.esp
xulCloudtopMountains.esp
xulArriusCreek.esp
xulPatch_AY_AC.esp
xulRollingHills_EV.esp
xulPantherRiver.esp
xulRiverEthe.esp
xulBrenaRiverRavine.esp
xulImperialIsle.esp
xulBlackwoodForest.esp
xulCheydinhalFalls.esp
xulAspenWood.esp
xulSkingradOutskirts.esp
xulSnowdale.esp
xulCliffsOfAnvil.esp
xulSilverfishRiverValley.esp
NPC new clothes V2.6.esp
Natural_Vegetation_by_Max_Tael.esp
Cliff_BetterLetters.esp
Tombstone Epitaphs.esp
Improved Ancestor Guardian.esp
PerceptionV2_1.esp
MidasSpells.esp
Beautiful People.esp
Better Cities Full.esp
Better Imperial City.esp
Better Cities Full FPS Patch.esp
Better Cities - All Natural.esp
Better Cities - Unique Landscape Barrowfields.esp
Better Cities - Unique Landscape Chorrol Hinterland.esp
Better Cities - Unique Landscape Cheydinhal Falls.esp
Better Cities - Unique Landscape Skingrad Outskirts.esp
Better Imperial City FPS Patch.esp
Better Cities - Unique Landscape Imperial Isle.esp
Better Cities - No LEYAWIIN Flooding.esp
Francesco's 10 days respawn time - 1-20 day lenght rescale.esp
Bashed Patch, 0.esp
Blood Glass Weapons.esp

If I disable the mod, the crashes stop, so I think it probably is that mod.