We stayed in the Zoo it self, it was fantastic. They have a permanent tent type set up (with en suite, air con, cement floors...etc) and they have a safari lodge for meals, and entertainment. The area is well away from the public areas and we had a "behind the scenes tour" which included animal feeding which was unreal. It includes two day access to the park, bike hire and lunch. I would recommend it if you have kids.
cheers
Pete