We stayed here in our 33' travel trailer in September of 2022 on our way back east from Colorado. You can't book online but I sent an email to inquire about reserving a spot and received a reply saying my spot was booked and to pay by cash onsite. It was a super easy process and so easy to get in and out from I-70. In fact, I just reserved a spot for August going back to Colorado. The price has gone up to $35, but still a bargain.