Park at the large pull out on the left hand side of the road about 3 1/2 miles up the canyon. Cross the street and walk about 25 yards down the road until you see the trail. Hike up the trail until you come to the short steep wall. Most of the draws on this wall are fixed.
The mileage is NOT very accurate. It's .65 miles from the flag pole at the cave visitor center (or whatever it's actually called). If you go too far you WILL find a large pull out, but you will NOT be near the right place. From the bottom end of the pull out cut back across the road, go up the fairly obvious trail (maybe 20 ft down the road) and it's only about 2-3 minutes up the hill.