Someone made up these instructions to find the Ehrenberg camp. I used them and found the camp with no problem. I've since left, but I believe several of the crew are still there. I think Bob said he would be there until the 3rd.
Also, if you prefer, these are the GPS coordinates to the beginning of the final road (the mouth of the road marked "you can camp anywhere along here" after the 1.2 mile measurement):
33.5932247,-114.486322