I'd go with Waverly, but Plymouth is fun. Haven't played New Seabury. What is that little nine holer that was renovated when they moved that light house? Supposed to be fun and quaint.
Whatever you choose, make your reservations now. Do not count on being able to walk on anywhere in July. Waverly and Pine Hills do a lot of outings. If you play Pine Hills, most prefer the Nicklaus, Jr. course, and I concur.