The hike is pretty easy but has some step parts and it might be hot from now to september. The Campground is closed but not the trail. You can actually park in the camp ground (N33 27.916 W116 58.312)
The trail start parallel to Arroyo Seco creek and when you get to a sign saying Wild Horse trail or Dripping Spring trail take the Wild Horse one.
Now there is no way yo miss it. Just keep hiking.
Cache contents (See picture):
Andy and DaVinci SW CD
Several key holders
Bottle rack for bikes
Tape
Magnets
4MB Compact Flash
Several sun screen block creams
Soap
Pez dispenser
Windows XP mini-CD
Hair clip
Postcard
Pen
Log book
Tb hc gur ebpxf naq svaq n qrnq gerr, cebonoyl fgebxra ol n yvtugavat, naq lbh ner nyy frg.