We just spent two nights here(in early May, 2021) and there are many great things, but we also had two big problems.
Problem one (probably only an issue in 2021). The sites, and in fact most the campground, have been re-blacktopped. It LOOKS great. So shiny and new. But the stuff is still quite tacky, and we ended up tracking tar into our RV and getting it everywhere. I accidentally knelt on the ground to look at something under my rig, and now I have a ruined pair of pants. When we put our leveling blocks down and leveled our rig, when we left, we found we had left giant lego-shaped impressions in the tar. And when it gets even hotter there in June/July...yikes, it's going to be a problem. Hopefully by next year, it will be better. But this is really something to watch for.
Problem 2: They did a great job re-surfacing everything(see above) but most of the sites, despite looking lovely, are very un-level. We had one heck of a time levelling our 30 ft class A. The sites slope front to back AND to the side. A recipe for a real leveling challenge. We walked around the campground and saw lots of very precariously propped-up rigs(our own included). It's a shame they didn't fix some of this before they resurfaced everything.
The campground, otherwise, is great. The spots are generously sized and spread pretty far apart. Each site has water, a metal picnic table with a substantial shade covering, a fire pit and a grill. Most have 50 amp electric, which worked very cleanly. Water pressure was acceptable.
Most of the sites also have great views of the lava field. The field itself has a 2/3rd mile loop trail with lots of interesting information. We actually walked it 3 different times, first in the evening(and we really enjoyed when the bats came shortly before sunset) and discovered new things each time. There are other, longer trails around, but when we were there the visitor center/gift shop were still closed for COVID and we had no one we could get good information from. We stumbled across a couple of trailheads, but were reluctant to go too far, not knowing what we were in for. The grounds also include some outstanding tent camping sites, if that's of interest. The dump station is easy to get to. There are also several new looking restrooms, but when we were there, all were closed(again, due to COVID). That was fine with us, but if you're needing restroom facilities available, maybe call ahead.
It's a lovely place and we look forward to returning.