San Luis Reservoir is a large artificial lake located in Merced County, California. The lake offers a variety of recreational activities, including camping. There are several campgrounds located near the lake that offer both RV and tent camping sites, as well as amenities such as picnic areas, boat launches, and hiking trails. Some popular campgrounds near San Luis Reservoir include Basalt Campground, San Luis Creek Campground, and Medeiros Campground. It is recommended to check with the local authorities or park website for current information on camping availability, fees, and regulations as they may change depending on the time of year and current circumstances.