What separates Watchman from every other Zion option is that it sits inside the entrance next to the visitor center and the pedestrian gate. It has electric sites, 30 amp with a limited number of 50 amp, but no full hookups, and generators are not allowed anywhere in the campground. If you are looking at the non-electric C and D loops, note that vehicles 19 feet and over, including combined length, are not permitted there. Standard sites open for booking six months out.
Tip: Reserve months out. Walk to the shuttle and skip the parking war.
Out the tent door: Watchman Trail (Hike, 0 mi) · Canyon Overlook Trail (Hike, 3 mi) · Emerald Pools (Hike, 4 mi) · Angels Landing (Hike, 5 mi)