Boulder Beach Campground — Lake Mead National Recreation Area
Lake Mead National Recreation Area, AZ
$20 per night no electric but has water, a dump station and clean bathrooms Some trails for walking and cycling about a mile from the beach and 3 miles from Hoover dam 
Good stop over site
We just stopped over for one night to use laundry and shower facilities while we were traveling north . Nice clean campground good for riding bicycles and walking, and a 60 mile loop trail around Tucson if you feel that way inclined.