I found the instructions a little confusing, so I hope to give you more details here.
As stated, enter through the Main Gate off of IL-137 (Buckley Rd). Just ID's were needed. Once you depart the Main Gate, go 0.2 miles straight ahead (to the end) and make a Right on Sampson. Then get into the left lane and make an immediate left onto Decatur. Go 0.1 miles and make a Right onto Mahan (just past the white gazebo on the left). Go down the hill to the Stop sign (0.2 miles). Straight ahead from the Stop, about 60 feet, is the sewage dump on the right (the Marina Building with showers is also there on your right). Turning left at the Stop sign will put you on Ziegemeier Rd. At 0.3 miles there water fill is at the Nunn Beach Pavilion on your right, and the Campground is another 0.4 miles on your right.
As suggested, somewhere around here, call MWR (847-688-6675) and get your site number and go set up. After that, you can drive your car to check in at the Navy Lodge at Bldg. 62. which is NOT in the area of the Campground.
