I know you can trap raccoons with plain old Wonder Bread but I don't know if it works on skunks. I personally don't like poisoning things (it makes me feel bad, and I once had a rat get even by dying inside the wall and smelling up my house for MONTHS) so I'd call the wildlife rehab people and ask for help.

We got rid of the raccoons in the attic by waiting until we knew they were out and then boarding up all the openings we could find.