Sounds like you best set would be a floating set. Get a log about 8-9 inches in diameter, 4-5 feet long and notch an area in the middle that you trap would set flush in. If you can find some otter scat, put it on the log. If not, just use some fish oil on it. Be sure to conceal your trap the best you can. You can also visit
www.trapperman.com for more tips.
~Lonnie