I think for less than a group or extended family camouflage is great. Those castle type bastions sound great but they SCREAM come and get me and mine. or the bad guys just say Eff it, ain't worth real troops just hit it with an airstrike (drone, or other Hellfire of bomb dropping beastie. You want as little a footprint as possible and the biggest buffer, early warning system you can think of. Plan, plan, plan and cooperate. The big challenge, is who can you trust.