I would avoid drowning skunks or any animals for that matter.. it just seems a bit cruel. I don't mind blasting one in the head as that's kind of the circle of life but when you have it in a trap and you can consciously make a decision on how it dies.. well I'd just look for other options. I know with some traps it's hard to carry them with an animal in it, sometimes they can reach you.. so it might not be a bad idea to tie a rope to the trap and then drag it to the corner of your yard before you blast it. I just think of it like this: if I knew I was going to die how would I want to go? I'd take the bullet over some lungs full of water. I'm not trying to be judgmental or anything and everybody has their own ways of doing things but it's just something to think about.