Use liquid roller. I have a 23 flat bottom bay rider and I only have to the rear wheels in the water. This works so good I have to put the boat in gear to hold it on the trailer to unhook the strap. Same thing when loading. Only put rear wheels in the water and I drive right up. Only have to apply about twice a year. Make sure that you don't unhook the strap until you are at the water. Good luck this is the best I have found!