I have been there twice, once in the stock wrangler and once in our lifted wj. If you get the chance, hit it on an event day as there are prizes, promotions, and trail guides that you can team up with not to mention the opportunity to meet lots of cool people. A friend and I had alot of fun in the stock wrangler (tj) and we were on one's and two's (we did opt to try a 3 and even slid down a 5). Their website(Superlift ORV Park in Hotsprings, Arkansas
) has a listing of the breakdown of how "hard" the trails are and a general idea on how capable your rig needs to be in order to conquer them with the least amount of damage.
1's are what I call "fire trails" or just your average gravel/forest road. These are all over the park and are used for beginners and as a way to get to the harder trails. Some of these are pretty washboarded and are very jarry. The second time we went my wife was about 5 months pregnant, and we opted to head on home as the Grand Cherokee's Suspension was not helping things out enough.
Overall all they do run a great outfit and we even camped in their camp site. The people were very courteous at the later hours. It is a great visit for sure!