Agree with nypatnva. Plan to walk or drive each loop to note campsites for future stays, as you will like this place. We just updated our notes, and it seems that the sites are a bit harder to get into on loop C. I would avoid sites 51-77 and 179 (its at a 90 angle, uphill with trees on either side).
You can also search the forum as other comments have been made on North Bend. You can see site pictures at
campsitephotos
2019 Grand Design Solitude 310GK
2019 GMC Denali 3500 D/A SRW