Dave, there is no aversion to hurting the beaver, either a crossbow bolt or some lead poisoning is in store for these critters, the problem is that the owner lives 300 miles away and I work for my self and this is my busy season, adn it's over an hour round trip for me. As soon as Christmas rolls around I plan on spending some quality time out there fishing and hunting.
Like I told Paul it's just another hunting opportunity, don't get your deer during the day, move on over to the damn at night.
I really want to get over there tomorrow and get a siphon running and then try some beaver hunting at dusk. I still haven't been on the land at dawn/dusk (well dusk just once, saw about 12-14 ducks come in and land and then listened to and saw 2 geese fly down the flooded Big Muddy, honking like mad, just about brought a tear to my eyes, it's what life should be about) and those are my favorite times for obvious reasons.
I am adding a good rechargable spotlight or two to the wishlist. Set up by the damn with the siphons running to attract them and then let them have it when they arrive. If we could do this every day I'm sure we'd get the problem solved. The problem is time.
If hunting them doesn't work then we will contact a trapper, but I don't want someone else to have all the fun.