Go past the main two boulder fields above and below the road. There is a bend, and a pullout right as the road bends to the left. Park there. The trail is slightly hard to find, but goes to the right off the road at the end of the pullout. Follow the trail as it wanders down to the Oasis boulder field. Eventually you will see two rock cairns on the left side of the trail. Head between the cairns, and you can work your way through the woods to the Sleep Hollow boulders. The map and GPS for this field is exact, so you may be able to GPS in as well.