I have a picture from "before" (2009) they upgraded those sites to full service ones. From memory the numbered ones in that section 41,43,47, 51 might have a slight hill pad. In this picture I believe the second site on the left is #47. https://www.irv2.com/attachments/photopost/data/982/hocking-171.JPG
I was able to reserve the week after the 4th of July a site on the other end of the campground. That end of the park each site is different. Some have tree issues, un-level sites, short sites...It's one of the park especially if you have a 30' RV trailer you better know the site you reserve.