Mazama campground is a great place to camp while visiting Crater Lake NP.  I was pleasantly surprised given some reviews I've seen.  The campground has quite a few sites, but they are generally spread out enough to give you privacy.  The bathrooms are fairly new and maintained.  The showers were still closed for Covid when we visited, so I have no idea how they looked.  There are even some sites with power, which I've seen very rarely in NPs.  On top of it all, you're very close to a store, restaurant, gas and Crater Lake! 

Pros:

* Well maintained

* Cafe/restaurant close to the campground

* Pretty loop hike right at the campground

* Crater Lake is close

* Ranger programs

Cons:

* Pumice volcanic soil gets everywhere

OK:

* The bathrooms smelled a bit mildewed