Visited Letchworth State park in late July 2023. We stayed in loop 500. 

The park, itself, is great. Not a particularly "wild" experience. The trails are mostly paved, and there are snack bars and toilets located throughout. A road runs along the south rim providing access to the overlooks, waterfalls, nature center, and visitors' center. But the gorge itself is fantastic, and the trails are pleasant. We liked the nature center, though it was a little small. Staff was universally helpful and friendly. 

The campsite wasn't spectacular, but it was solid. The sites are a little close together (you can see your neighbors through the trees), but it was still quiet. They all have the standard fire pit and picnic table. There are central showers for each loop, and we found these to be clean and in good working order.