Ferguson is two miles into the back country at Mammoth Cave. The last half mile, trail to campsite only, is a bit thick with a stream crossing. At 1.5 miles you’ll hit a nice spot where two streams come together. That’s your water source so load up before the last half mile. Ferguson is extremely secluded, nice tent landing, fire ring and trees for hammocking. Permits are required for all Mammoth Cave Backcountry sites, they can be obtained at the Visitor’s Center.