Put a 1/2 full 5 gallon bucket of water Ned to the target. Put a handful of sunflower seeds onto of the water to float, then put a branch/2x4 or some other type of ramp leaned up to the top of the bucket. All that is left to do is go out and empty the bucket every other day of all the drowned mice/chipmunks. Works like a charm, and my boys find great joy in "trapping" them this way.
I just dump the bucket back in my swamp. The water starts to stink real bad after a few get in there.
Being your only a couple miles from me, the water will freeze overnight, so set it in the AM and empty in the PM when it starts to freeze.