I'd love to give this campground a 5 star review, and perhaps if I had tent camped, I could.
Rented one of the cabins for a night instead. The combined smell of disinfectant and mold was overpowering. The black mold growing on the ceiling and walls was both obvious and concerning. So if you are looking for a cheap place to stay within 3 miles of the national park, rent one of the 10 cabins only if no one in your party are susceptible to respiratory issues.
Considering the fact that Volcano House is bringing in $900+ per day on the rent for these cabins, they really need to maintain them better. Far better.
On the upside: the beds were comfortable, the sheets were clean, there is a double gang power outlet in each cabin, and the location is excellent as far as proximity to Volcano NP. The view of the eruption emissions from the cabin was impressive.
But I wasted $90 to rent the cabin, had to sleep outside to alleviate the serious breathing issues encountered from spending less than 2 hrs inside.