How do you get rid of a possum?

okay, so, we brought the camper back from the deer lease this last weekend. We noticed a lot of corn and other random things all over the place. Something has taken over the camper!!! We thought that maybe it had gotten out on the trip home, but nope... it keeps moving things around in the camper. It has now starting collecting the wood backing from under the couch to make its little home. We want this thing gone before it tears apart the camper. We went in and made noise but didnt hear anything. Could that be it "playing possum"? Ahhhh... its driving me crazy! and ewww... they are kinda scary looking!!!