Here is a map.
http://www.jorba.org/sites/default/files/JH3_0.png
You park off of the airport access road and ride through the opening in fence and look for trail on your left. This is animal chute. Make a right onto this trail and work your way up until you come out to a road.
Most people go counter clock wise so head for lower warthog. Coming out of Animal Chute you will make a right and follow road up to big parking lot and stay straight looking for trail head up on right.
Looking at your map you want to hit Warthog, Otter, Rhino, Tanks, Cages, Boon, Fish, Goat and Lower Chute. This is the basic loop.
These trails are doable on a HT, Woody rides his SS Rigid bike here with no problem. You need tubeless tires so you can run between 20-25 psi, this keeps you from bouncing all over the trails.