If you want to camp at Olgilbe, it will be the closest! Exit on Olgible and turn right. About 1/4 mile down you will see a sign on the left that says, "Olgible Recreation and Demo Area. Turn there and just find a spot you like to camp at! Before you turn left there, on the right is the pay station.
If you want to camp at Gordon's Wells, go past Olbilbe about 3 or 4 miles and exit Gordon's Wells. Go right and then at the stop sign right again. Follow road until pay station. Pay and then find a place to camp! Olbilbe is a lot more relaxed and less crowded!