Tonto Lone Pine Ranger
This description serves to inform those who are interested in hiking the Amethyst Trail, to Brown's Peak, part of the AZT or (for those overly-ambitious folks!) the Mother Lode, but are put off by the 5-hour drive (round-trip) from the East Valley. That's a lot of driving in a single day for one hike.
Located about 500 feet north of the Lone Pine trailhead is a rather large, fairly level dispersed campsite that would accommodate multiple tents and rigs. There are no facilities of any kind at this campsite (unless you count the 4 previously-made rock fire rings). I should also add that there is really no shade to speak of. However, there are views of Roosevelt Lake, craggy Brown's Peak, and the city lights of Phoenix (if you're into that sort of thing).
If you don't have a need to see the city lights and/or if you want shade, there are 2 other (smaller) camping spots a short distance back down (headed north) on Pigeon Spring Road.