What type of safety gripper do you use? Do you dye your conibears(boiled dye or speed dip)? what brand 330's do you use?330 hands down for me. For one thing it is a kill set so it only has to be checked every 72 hours. Next is that you don't need deep water to try to rig up a drowning foothold set. Also a lot faster and easier than carrring weights or filling bags for drowning.
Another thing is that I don't get as much fur damage with 330's, even with the trigger on top. I know you don't always get damage with the snares but it seems over all I have less damage with the 330s. I still use snares in some cases but I prefer the 330.
As far as the danger goes, just carry a safety gripper and there shouldn't be a problem. I even let my girlfriend run her own small beaver line without worry. This is her first year of beaver trapping and she sets the 330s by herself with the use of a one handed setter. With the setter and the safety gripper I don't worry at all about her getting caught. As for myself I think I would rather have a 330 around my wrist (yes it's happened, didn't have a safety gripper on the trap) than a CDR or a MB 750 clamped on my hand.