Tips on Vacancy
If you would like to find out what dates are open for a particular site simply click on a "Reserve Now" button.
The reservation page will pop up and once on the reservation page you will see to the left by the calenders a "My Dates are Flexible" option.
Click that and select the dates you are thinking about. For example Aug 1st -15th. Click "Next" then there will be another "Next" button a little lower. Click it. "You don't need to do any options." Now you have the map with all the overnight sites in green. Click any site and it will show you what is already taken and what is not.