Family from NYC vacationing in Orleans, Cape Cod. Two parents, two adult children. We are looking for local, casual suggestions mostly for lunch and dinner. One of the children is in the restaurant business in NYC. We would love to have authentic (not touristy) lobster/clam shack type food as well as one or two places a bit nicer. Also we are interested in specialty markets or farmers markets to get items to cook at home. We would like to keep the travel distance to around 1/2 hour. Thanks in advance!