Well here in Northern Michigan where we have docks that run down into the lakes at all of the ramps, we don't power load or unload.
I just tie the boat to the dock and back the trailer under the boat and hook the front cable and pull out. the boat doesn't touch the bunks until I start up the ramp.
For unloading I just back it in until the boat starts to float, stop, unhook the cable, float the boat back alittle, tie it to the dock and go park the truck & trailer.
Also check and see if you have enough room for your tailgate to open. I open mine before I back down the ramp, it makes for a nice step and I never have to get my feet wet. JB