A lot of people have recommended against bbq but if you insist, BTs Smokehouse in Sturbridge MA is about the best in new england and it's an hour drive from PVD in the opposite direction of cape cod. There's also Sweet Cheeks in Boston, if you like to sit in traffic and pay $25 for parking. As for cape cod, it's worth the time to trek to the outer Cape and visit the upper reaches of the national seashore. There are some great walks in Wellfleet, Eastham, and Provincetown which are especially beautiful this time of year.