I wouldn't base your whole decision on having ONE free lift ticket. Stratton is a big wide open mountain with very little "challenging" terrain. I would also personally avoid it during the US Open week, it will be packed. Huntah is clser, but more a 1-2 day mountain with not much to do. I would suggest Okemo, Mt. Snow or even Killington, all have a lot to do in the area and a good amount of slopeside units. I see you have been to BB 8 times this year, do you have a pass? If so, I think PEak Resorts, BB owner has some areas in VT, Mt Snow, and your pass might give you a discount there.