Armed Bear,
It's not just at night. Last time I was out that way, one of the other guys out there commented that they had to call a cease fire one time, when three guys hiding in the bushes UP ON THE BERM came out with hands up, screaming. From some of the shooting areas, an airsoft gun held perfectly horizontal could cross the border.
As for the shotgun shell litter, I have a few ideas on that. A lot of people pick up their own brass, and the locals (there are locals) scavenge the brass that gets left behind (talked with a few of them last time out). That eliminates the lion's share of centerfire pistol/rifle ammo casings. This is kinda dumb, in a way, becaues the shotshells are a LOT easier to find, lying on the ground, or at least, would be, if the ground wasn't covered in 3 layers of them to begin with. Hell, we find lots of unfired ordinance on the ground up there each time we go. Actually, that's something the cleanup crew might want to bear in mind: There is a fairly good amount of unfired ammo lying on the ground, some of it perfectly capable of being fired/set off. Be careful. Finally, a lot of the people who shoot their shotguns there are shooting clays/beer bottles/etc, and don't care what crap they leave behind to begin with (else they wouldn't be shooting non-biodegradeable clays).
Just make sure the border patrol knows what you guys are doing in advance, and doesn't think you are digging tunnels.........heh
