Chub,my bread and butter set,is the castor mound using a 330.I have some pics on here of the set---the photos are of half submerged 330s.I have used this set,at all times of the year and everywhere from half submerged to totally submerged---this set just flat out works.
330s are the way to go,I have talked to kids on the phone,and had them catching beaver the next time they set traps.
Are you going to the NTA convention? I will be doing a beaver trapping demo there,as well as several other state conventions.
We will get you all primed and ready to go on beavers,as questions arise--ask.
Tom