If there was not waiting period - you drive in - get on one of the available, walkup or non-reserved sight. Get all set up and guess what - someone went on line an hour ago - reserved it for tonight and someone comes to tell you that you must move. After only a couple hours on the site. That is why there is usually at least a 2 day period that you must wait before you can get onto the site you want to reserve. It would be chaos if you could spur of the moment go online, reserve the site and show up 2 hrs later.
