If you are at the beginning of the cape, I would recommend Pine Hills in Plymoth. There are two courses there at they are the highest rated courses in the cape area.
Chatham is nice: They are reporting some great white sightings, but other than that it is wonderful!
I stayed in Hyannisport last year, and played this par-3 course a couple of times: http://www.twinbrooksgolf.net/ Not bad at all, reasonably varied and challenging. The 18th hole is terrible, but the others are good.
I loved the Cape and I loved my birdie/birdie/par start to the Port course...until the 4th hole.
I've been living in San Diego for the past 4 years so I'm not used to all those brown things with green tops lining the fairways. I was hitting 3 off the tee all day but hey, thanks for the recommendations. Course was beautiful; wish I played better.