Try regular spring type rat traps. Bet they would work. Sort of like running a trap line. Try peanut butter for bait. Quick story - Years ago my wife and I were on our honeymoon in late Sept. up in Maine. We rented a house boat for a week on Moose Head Lake. Ran short on gas, and found a "country" marina. Could not find anyone around, so we walked over to a couple of old, run down cabins. We were almost to the steps of one when I stopped, and thought "Holy Crap"! There was an old guy sitting inside the screened in porch, and I swear he had at least 25 chipmunks on him. He was covered. At first I thought he was dead, and they were eating him. Then the wife seen him, and she screamed. Then he moved, and I realized he was alive. I think he was hand feeding them. Freaked me out, and that's hard to do. He was covered with them. We just turned around and left. Got our gas a little further down the lake.
Larry