Or you could carry a small 10 lb anchor, drop it in 3 feet of water, get your wheels and then bring the boat in, as long as you don't have a strong onshore wind/waves pushing the boat toward the rocks.
Hobie makes a roto-molded 16 foot cat called a Getaway that shuould survive a rocky shore if that is going to be a constant problem.
Yes it's a bit more hassle to launch but once on the water there is no comparing an F16 with the plastic resort boats. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />