my experience with towing canoes and kayaks suggests that if you can get the tow line low enough to lift the bows the boat will become docile. i dont know what kind of boat you have, i have a hobie 16. i can imagine a loop that wraps around the hulls just behind the front pylons, hook up to the lower part of the loop so the tow line lifts the bows. set it up so the loop cannot rotate and the bridle is fixed in the center of the loop. creative knot tying .i have never tried this, but i know light boats tow best when the bow is trimmed high. a tow that pulls the bow down will create wild yawing. if you plan to do this often you might consider adding towline attachments at the waterline on both bows. a sealed hole at the waterline through both bows would be best in my opinion.