I'm not sure what kind of a seat you have, but my Cape Charles has a creature comfort seat in it, which is attached to the hull with velcro. I'd carve one in foam instead of buying the creature comfort, but with the velcro holding it in place it stays put when you stand on it.

: I just finished my Chesapeake 17, and love it. It paddles well, is responsive
: and a pretty nice boat to look at. There is one small problem. The
: "floor" in the cockpit area is varnished and very slippery when
: wet. I have old, worn out knees and have to get a good purchase with my
: feet to make a dignified exit. Found this weekend on my new boat trials
: that I had to work hard not to have my feet (wearing Tevas) shoot out from
: under me. I did a temporary fix with dorky looking Rubbermaid non-slip
: bath treads, but would like to find a more aesthetically pleasing
: permanent solution. Ideas please?