This is my wilderness maps idea: the passage/room tiles represent cobblestone pathways and old clearings through the woods, and I surround them in the gaps with model trees to represent the forest. I think this should work pretty well once I've painted up the hirst arts pieces :) Sort of like old RPG games like "Lands of Lore" where you follow a maze-like grid path through the wilderness with impassable terrain surrounding you.
So, a while back I made a 'wandering monster die' which was a painted D6 with things like N, S, E, W, stay still, move in direction of nearest player, marked on it. (red and green for stay of go toward nearest player).
Today I made a paper triangle with skull and crossed swords on front and back, and a slot underneath. You write down the name of a type of enemy on a slip of paper, and insert it into the slot. The trangle counter moves around the table using the wandering monster die, and the moment it is in line-of-sight to a player figure, the paper slip is read, the counter removed, and a group of monsters is spawned at that location!