This is a camp ground that is on the road, at the top of the hill above Camp Wolfeboro.
In brief:
1) Highway 580 to Highway 205
2) Highway 205 to I-5
3) I-5 north to Stockton where you take Highway 4 east (note there is about a mile of this that follows Highway 99 South to the Farmington Rd exit)
4) Highway 4 through Angels Camp and Arnold.
5) Continue on Highway 4. After about 18 miles from Arnold you will pass Cabbage Patch Maintenance Station
6) Continue about 1.25 miles. You will see Big Meadow Campground on the right, but the sign may be covered up.