Here at Piazza Uccello we have a laissez-faire attitude toward our bee/wasp populations, as in, I've already taken a hit for the team and nursed my first wasp sting. Unless they're in the tongue of the trailer or near the front or back doors they're pretty much in like Flynn. The carpenter bees are just as bold, making a home for themselves on our front porch (they're going through a relocation program at the moment) but the mason bees have simply disappeared. I did spring cleaning anyway, in case they ever show up again. It's been 6 or 7 years.