If you are doing studios for more than 2 adults in each, you may want to consider OKW, since the studios all have 2 real queen beds, instead of a queen and full sized sleeper sofa.
May want to get studios.. it's good to have some "away time" imho.
We are going with 9 summer '10. We are staying at the THV with my brother and his family.. I'm a little nervous about staying with all those family members for that long.. hoping for the best..