We visited Great Sand Dunes National Park during the off-season (December) and searched everywhere for open RV campgrounds. Options were very limited given the time of year, but Base Camp was open--an

Level sites, easy in and out, great showers and bathrooms. Be sure to visit Alamosa visitor center, lots of great information about the area and Colorado in general.

We were passing through to see the Great Sand Dunes (20 mins away) so we just needed a one night stay. We reserved a spot that same day. They were very friendly on the phone, and sent a text and email