Well, we TRIED to stay here but it wasn't open as of May 11, 2021. We did ride through parts to check it out for the future.
Funniest thing, at the entrance are old school phone booths. With zero cell, you will be kicking it old school.
The loop we drove through was definitely not big rig friendly. There are picnic tables, fire pits and bear proof storage boxes at each site. We saw a grizzly, so take it seriously.
The marina is around the corner. Boat rentals, etc are right there. There are flush toilet, a definite plus. The sites are close together, but if you just want to hang at a campsite and relax, maybe look elsewhere. This is a home base for exploring all the Yellowstone had to offer. We will be back.