Camped at Watchman in late October early November. Experienced sunny days, cold nights and even a little snow. Regardless of the weather, Watchman is the best place to park your camper and venture out to experience the best of Zion NP. Easy short walk to the visitor center and shuttles. (On a side note the shuttles were a much better experience than we were expecting).
Camped in C loop. Sites were typical National Park, small and close together but well positioned. We had close access to a modern restroom that was clean and well maintained. Parking for an extra vehicle was close by and convenient.
Firewood and ice were available in Springdale via a 5 minute drive (you have to exit and reenter the park If you drive). Or it's a 10 minute walk via a bridge directly from the park to the store. Make sure you have your Parks pass or receipt to show the Rangers when you walk back across the bridge to the campground. We definitely recommend walking.
We did not visit any of the restaurants, shops or the brewery that were located a short walk away but will on the next trip. The hiking in Zion is top notch with trails for all abilities. Make sure you check the status as several of the trails were closed due to bridge repairs.
We experienced a first: It was Halloween and many of the kids camped around us dressed up in costumes and went trick or treating. Many campers put up festive lighting and one even set up a full size inflatable castle which was a big hit. Instead of expecting treats from unprepared campers, many kids took their own treats and handed them out. It was a lot of fun for all.
Watchman is difficult to get a reservation for but worth it. We can't wait to return.