I'm not sure where you fellas have played, or are planning on playing, but it doesn't sound like you're going too far from suburbia. I would suggest you look deeper into less travelled areas. Put signs in your vehicle windows on the roads, let people know you're there. You can't just play anywhere....you've gotta put some thought into it.
The same little senario could happen on private property also. John and Jane don't consider themselves tresspassers if they're just on a nice nature hike.
On the seventh day when God rested, we overran his perimeter and we've been running the show ever since....