Great park in a great location
I have been camping at Rocky Neck State Park for decades, both tent camping, and now In a 30' camper. Located right off I95 ( which you can hear at times), the park is convenient to all the major interstates and state roads. If you can, stay away from the front gates during the typical peak arrival / departure times. Traffic jams occur, partly because you're also in-line with the car loads of beach goers. The beach and beach parking lots fill to capacity. Week ends are the worst.
The campgrounds are located within internal loops. Most sites are quite level. Park-like settings surrounding a large lawn. Bathhouses are being rehabbed, deemed adequate; can be seedy towards the end of the season. Park is routinely patrolled by State Conservation Officers who will put you out if needed. CT State Police and local officers also patrol. Camp roads are paved, and lots and lots of kids spend time riding bikes, coloring with chalk, skateboarding, roller blading.
No electrical hook-ups; potable water spigots located within the camping circles. Generators allowed, but there are quiet hours. Dump upon exit; its up top by the entrance booths.
There is a "tent-only area" which is nice and abuts a paved road for campers to walk / bike to the beach. Use this. Stay off the main road to the beach if you can. The speed limit is enforced, but sporadically. The fines are very stiff (you receive a State traffic ticket from the Officer).
This beach road leads you to a wonderful overlook where lots of people take their kids crabbing for Blueshells. There are size regulations so be careful. The regs are posted. Bring some raw chicken wings and kite string and have some fun. You can also follow the signs that will lead you to nature walks. Amazing.
During inclement weather some campers leave the park. We always recommend taking a right out of the park onto east bound Route 156. Follow into downtown Niantic for restaurants, an Irish pub, or a movie. Nice village area, and pedestrian friendly.
Rocky Neck is a very nice park, and if I had to list one complaint, it is that the State is in a financial tight-spot, and has been cutting services and personnel. Entrance booths go unmanned and that leads to traffic jams that extend out and onto the main road. Very , very messy. Life guard towers at the beach are empty at times. Bath houses can be filthy.
All things considered, I would recommend this park..