1) Are there sites for small RV's? 2) Hookups for water and electricity? 3) Fire Rings?

Yes there are sites for small RV's. To check each individual site and to make reservations, go to Recreation.gov. There are no hookups, but yes there are fire pits.

RV’s will definitely fit adequately for double sites, as labeled on recreation.gov, didn’t see any hookups or water and most sites will have fire rings included.