We came down from North of Medano Pass through the dunes, planning to camp in the dunes but got down too late to buy a permit from the visitor's center and the Pinon Campground was full. The only other close option for overnight camping is the Oasis. They charged almost $40 for 3 people, one night. We slept sloped and over a ton of large rocks - there weren't any other spots. They are racking in the money at this location, you'd think they'd at least spend the money to level the grounds and put in some sand/remove the rocks. I'm thankful we only stayed for one night.

The actual Oasis store/restaurant on the other hand was super convenient. We had dinner and breakfast there and albeit a bit expensive, still good and all of the staff was super friendly. We also rented a board for the dunes which was easy.