Just made my res. and they charged me $20 per night for the campsite plus a $3 res. fee, which is still quite reasonable to me. Maybe the higher cost was because I have an RV but just FYI. I also saw that they allow two vehicles and up to four tents and eight people per site so bunch up if you want to save $$. There is also no place to note that you're part of the geocaching group so I went to the park website (can't get there direct from the reserveamerca website so use the park link) and e-mailed them direct, referred to my res # and dates and told them that way.