Hi Lizz - camping in the US is a little different than in Europe - mostly because the size of the campers is different. Sites over here are much larger than the ones that I saw when I was living in Germany.
I have to laugh because even my small trailer trailer here (21 MB Amerilite) is much bigger than a lot of the units that I saw on the motorways and autobahns on your side of the pond.
Take care!