I stayed the full summer, June-September, at this cute cottage. It was set back from the main road enough that there was no annoying traffic noise at all. It was very spacious and had everything I needed for a 3.5 month stay. It is super close to the entrance of the National Seashore and beaches. The owners were attentive and very pleasant to work with.
I would definitely want to stay here again, if I am ever back on Cape!