For years I have been just wiping down the boat at the ramp with a damp towel and a dry towel. Once in a while I would use a spray wax cleaner. Once a year I would buff out the boat with Meguiar's Mirror Glaze and then use a good paste wax.
At the Western Allison Rally, one of the guys introduced my to BABE’S Boat Bright. I have been using it at the ramp instead of water. It seems to work nicely and the boat is looking better than ever.