Definetly -- get a massage! It's one of my favorite parts of vacation!! Renting a boat and puttering around is always fun and relaxing too. If you are lucky enough to get a vacation home on the water (we got one near southpoint last time) you can feed the ducks. That was fun - they came every morning when we called. We'd never seen anything like it (next to housepets -lol).
There are so many fun and relaxing things to do at OKW. Have fun and enjoy!