I know this may sound like a longshot and maybe a little bit of extra work but, if any of you people that are soaking your traps have got a view from your house, of your trap, it might be worth setting up a half decent dslr camera with a telephoto lens on it to take photos every thirty seconds and get a solid time lapse view. You would in theory, hopefully be able to get a basic shot of boat type, and maybe even a name or license number off the stern or side of the hull...