Ray,
Tie a 30" rope to your trap when you get it finished. Set your trap next to a ditch, creek, or pit. (lined and filled with water) When you catch the little bugger, gently pull him trap and all into the ditch. They will drown without spraying most of the time, and if they spray, it is under the water and does not stink bad at all.
I use this method often. It seems every so often, I have a rapid rise in skunk population and have to take matters into my own hands or deal with the dog causing skunks to spray and stink up the yard. A couple years ago, I dispatched 12 skunks with this method.