Oregon is very good at detailing what power is available at campsites on their booking engine, Reserve America. It can vary from loop to loop or site to site in some parks. You'll get the details you need from their Reserve America site, however I don't like Reserve America as a campground booking system, super dated compared to others and kind of clunky. But Oregon gets all the site data in there.

30 Amp max if I remember correctly. Sorry.

West side Of the park had 30 amp south side of the park had 50 amp