I always thought(in theory of course) if you boated out on a pond or lake, and found a patch of cattails that extended 10 to 20 feet from the shore, to take some good loppers and cut a trail back into the cattails toward shore a good 4 or 5 feet, anchor your float off to side cattails or use an anchor, and cover the floating colony with the cut cattails it might be a good hidden trap and the muskrat would investigate the new swim/runway, this is all of course speculation on my part, Kip probably has more knowledge than anyone about this so I would defer to him..