Boxcar Canyon Dispersed camping area in Lake Mead NRA offers stunning views of the surrounding red rock formations and desert landscape. There are plenty of nearby activities including hiking, fishing, boating, and swimming. The campground is first-come-first-serve and offers no amenities, so be sure to come prepared with all necessary supplies. The camping area has 20 campsites with no designated spots, and the best time to visit is from October to April when temperatures are cooler, averaging around 50-60 degrees Fahrenheit.