I have been to Backbone a few times, this spot is one of my friends and I’d favorite. There is no through traffic so it’s quiet. Tons of trails, specifically the spot we camped at was right by the trail so we had easy access. The sites are big so you can camp far back and keep the vehicles at the front. I was able to fly my drone here and it produced some amazing footage, check the descriptions you are interested!
The bathrooms weren’t the greatest, and their aren’t any showers near the site we stayed at, so be ready to be dirty for a couple of days.