Found nothing on camouflage, but I'm sure it has been brought up in some way.
I know it's pretty hard to hide a house built on the surface. So no camo for things like that. But what about for vehicles (maybe camo for cars/trucks is too much, but what about motorcycles and pedal bikes?), tunnel entrances, tents.
Would be great to ride your bike into enemy territory (like in heroes and generals), hide it with some camouflage you brought, do your mission and if you survive come running back to your hiding place to make your escape.
Or hide your underground base secret entrance so if your main entrance is being attacked you can flank the enemy or just make your escape.
And of course camouflage clothing.
Anyways, not much explanation needed here...