Black bear units can generally accommodate that number and all have hot tubs. They are right on top of powderridge. They are quite nice. Some will sleep 20+ First tracts has most on their rental program. Snowshoe has one (#10) that is four bedroom and sleeps 12 with pull out but that might be too small.
I've stayed here with friends a few times before. http://www.vrbo.com/160012 Beware of a couple of things. The bedrooms in the basement dont have windows, which I'm pretty sure is some sort of code violation. To use the internet you need to be with 5 feet of the router. And the hot tub wasnt hot. But according to the reviews that issue has been resolved.