^Well it's rocky, so there are rocks under the lakes.
I did get out of my Jeep a few times to check how deep the holes were. Most were not deep but just l-o-n-g, and parts of the trail to Marble Head were torn up. I would not want to break down out there as there were just a few ATV riders around, and two groups I talked to were both asking me for directions. (I can see why they say to travel in groups.) Trails seem to be marked with numbers, but it gets confusing so do get Steve's map as anything would be better then what we all had.
There is logging going on, and the log roads have been put in running north-south, west of Marble Head. I traveled on one for a mile or so, and then came to a dozer that was repairing the "road" in a low spot. I can imagine these log roads are slick so I'd avoid them in the rain as you could slide off them easily (their just dirt... little sand and not level). Plus the trucks' tracks are wider then a Jeep, so I'd have one tire in their track, and the other in the center so I was not level. Cool to see though! (Like the TV show Swamp Loggers.)
I did get lost once, and went through several large holes twice (water about came up to the top of my tires) as we had to turn around on a tight trail that was ending. The trails are narrow through the trees and even fields with tall grass and ditches running alongside, and would require some backing if you met another Jeep. But it is off season so few people are around. I did see several full size trucks heading east when I was heading out, and I'm not sure how they'd fit on a lot of the trails?
It was a blast, and as said I'd love to do an organized run. I did come back to the cabin and have a couple of these...