Could only get one night at the Mather CG in Grand Canyon, so we went boondocking just outside of the National Park in Kaibab NF.  It was only a few minute drive from the park entrance, and had nearby access to shops.  

This is a primitive campsite so no facilities, bathrooms, water, and pack in pack out.  There were a handful of campers here but enough space along the road to find a private spot.  There were a few other nearby forest roads that offered dispersed camping but this one had fewer people.

Would certainly camp here again if we can't get a spot in the park.