I don't think there's anything worth worrying about in BiBe, especially now that they're reopening the Boquillas Crossing and building a new facility. I think the BP keeps a pretty good eye on things there, and it's far enough off the beaten path on both sides of the border to not attract any riffraff, imho..
Javelinas are everywhere and will sniff-out stuff around your tent while you're in it.
Of course, I'd be inclined to pack when out and about just because over the years the mountain lions have been known to attack people..
Love it there.
John
it definitely didn't seem that way then, i think we saw one BP truck the whole weekend we were in the park, saw plenty farther north near marathon though. there was a pretty steady stream of vehicles in and out of the campsite. according to one of the other campers, they were using light signals to notify when it was clear to cross. this person said she observed several groups of people bringing packages back and forth across the river.
after my midnight encounter i went to check out the spot where the two men bolted towards when they saw me. there had been so much traffic on the trail that it looked like a cattle trail, and there were fresh prints leading right down to the river, just next to that was a white rag tied to a branch to make it easier to see where to cross to in the dark, with another white rag tied to a branch on the other side about 50 yards downstream.
now, i don't know what these folks were moving across the border, it could have just been supplies for the folks in boquillas, but the fact that cell service was at least a 20 minute drive away, and its not likely that we would see a park ranger or BP all night didn't leave us feeling like that part of the border is very secure