Grass Shack Camp is one of the campgrounds in Saguaro National Park, where you are allowed to stay overnight with a permit. Permits can be obtained at rec.gov. An overnight stay is 8 dollars per person and night. This is one of the two camps along the Arizona Trail.
There are 3 sites with a maximum number of 6 persons per site. Each site has a bear box. Grass Shack is a great campground that offers shade from large sycamores as well as other riparian species. Two of the larger streams – Chimenea Creek and Madrona Creek – run through and by the campground, providing water most of the year. Fires are not allowed here.