I took the bus to Provincetown each weekend during the summers of 1979, 80, and 81. I never made reservations in advance, there were always some cheap rooms for rent in little rooming-houses back in those days. It was exciting, the scenery, atmosphere, and guys were great, and it was a great introduction into the gay community. I haven't been back in 30 years, though.
From 1989 thru 2000, I spent a week each summer at a little retreat run by the Unitarian Church on the beach in Saco, Maine, which sponsored a Gay Week. Some years I camped in a pup-tent in the campground, others I stayed in a room. The camaraderie was great, many different activities, and it was a wonderful place to make friends.
I also enjoyed taking my kids to the playground in the park when they were small.