We are using spawn point markers. Each is.numbered and placed either on a table.edge, in a cluster of ruins, sewer opening, or other interesting feature that looks good and makes sense. That way contacts might even spawnencpawn in centralized areas.
Two Hour Wargames uses PEF markers to represent Possible/Potential Enemy Forces. I've stolen this idea for our spawns. They are initially placed as a marker and are only revealed when they are in Los and 24" (less depending on weather conditions). This keeps tbe tension high as it might be a pack of wolves, lone zombie, major demon, or just a stray cat.
I'm also using cards to spawn hostiles to match my collection and threat levels. That way I can tailer
the theme of the day (undead heavy, spider lair, underdark, etc. The decks will grow as I get more painted up. This helps with the spawn method.and PEF as above.
For balance purposes we have discussed using some form of the following. Place terrain, spawn points, treasures, etc. Each player rolls a d20 and and add's their
wizard level. lowest total selects starting positions. Roll again and lowest roll gets to set starting order. Lower level warband should get better options more often.
Skipper