There are 2 campgrounds on Crater Lake, Mazama and Lost Creek. Mazama is huge with 7 loops and 217 sites some dedicated to RVs with hookups and power, a camp store, laundry, showers and the works. If you are traveling with your family Mazama might be more comfortable and fun. But if you enjoy more primitive camping in smaller sites than Lost Creek is your jam. There are only 16 tent only sites and no reservations so they fill up! Don't roll in on a Friday afternoon and hope to get a spot in the summer. The good news is if you are out of luck at Lost Creek then Mazama has almost 100 sites they hold back from reservations for first come first serve. For being so rustic Lost Lake still has the standard national park amenities... picnic tables, food locker, fire ring and yes even flush toilets.