Sorry about your Uncle. The wife and I stayed on Pochet Island last year in one of the houses with Stew(Longshot). Unbelievable view of Pleasant Bay and Nauset. It was about a 10 minute walk to the beach. Dream home for sure.
One of my favorite areas of the cape. I have hiked all around that island too. Cool pond filled with turtles there. By the way beware the ticks! Even in the middle of winter there are many ticks in the grasses.