LAke Hopatcong NJ A-cat sailors use two 16 foot long 2x4s that are framed together, and pivoted onto 2 posts at dock height. The outboard ends are weighted with sash weights to go into the water. They have 2 inch PVC pipe halves screwed to the 2x4 upper surface for sliding the boat on.
Sail up, straddling the 2x4s, push the boat up and secure with a line. Now weight the inboard ends, sliding the boat up onto the platform or seawall. MAybe use a light winch?

Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison