There are cabins in the park; they can be reserved at the website for Recreation Resource Management. There are also several motels in Burney, California, about 15 minutes to the south of the park. Good luck.
In fact, the park between the waterfalls and the lake, there are cabins for rent to spend the night, you have a bench for 6 or 8 people with a grill for what you have planned to do and they have the distance between one cabin and another you need to call the park to reserve one.
I'm not sure, because I've never stayed in one, I live three hours from there. sorry I can't help.
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