Greg hit it pretty close. I bought platinum 2br for $4,500 and think the price has gotten down to $3,000 consistently. If a 2br is $3,000, I think a 3br is 4-5,000. You need to own at least to units to book 13 months in advance and get the high demand family weeks.
The 3br has a special value for families, but only Christmas, Presidents week, and Easter. The Gold season summer three bedroom can find families all summer long. I think the 3br/2br premium is bigger in the summer.