Joining Good Sam on a campsite (since we're from Europe)?

You can buy the camp grouping directory on Amazon. State parks are always full but private parks are almost never full. We don't make reservations and there is all ways room for our 34' TT. Read the park directory and if you find a place you rant to go and you know when you'll be there give them a call, but forget about state parks or parks on the Atlantic in the summer.