When I got my recent boat the trailer had the side bunk kit from Cabelas. Let me se if I can describe this well. When the bunks are installed, there are 2 corners at the top. The rear one is the first that would go under water. When I load my boat, I put that rear top corner about 1-2 inches above the water and the front top one is well out of the water. I can glide mine slowly up to about 1.5 feet from the roller. I step off the bow and get down to hook the strap and it pulls up very easily right to the post. Easiest loading setup I have ever had. Whether I'm going electric only or gas makes no difference. The bunks are plenty high and it loads easily.
Tom