For some time I wanted to go camping with the kids and I came up as an idea to take advantage of the good weather while it lasts and share family time. After having spent 7 hours on a plane with them I feel that there is nothing that we can not do with them.
I can tell you in the US you can book at https://www.reserveamerica.com
, we chose Pawtuckaway State Park in NH on recommendation and it was a very wise decision. The camping sites are listed, and each one has a parking spot and picnic table, most are facing to the lake. There are bathrooms and showers. This park has a beach, play ground, store and you can also rent canoes and kayaks.
....and we had a super time, the only thing that would make it different would be to arrive earlier to enjoy more time together. The rule was nothing of iPads and cell phone just to take photos. Thomas said it was the best day ever. We will definitely be coming back soon.
Here it is a link of the video on YouTube of our experience