1)Mixing camo = OK. If you check out some folks they'll mix top and bottoms in various patterns to help break up their shape and signature. In other words two small different lumps, instead of one big same lump.
2)Local cam patters. Hit up a few games in the area and see what folks wear, and then look for the people you can't see until they move.
Airsoft, where nothing is hurt but feelings.