and welcome to the forum Raine!
Our family went to Marakele yesterday purely as day visitors and perhaps our experience will set your mind at rest, Raine, with regard to the sightings you can expect. (You did not specify your dates?)
On arrival we were told that a cheetah was lying on the small road at the tunnel which connects to the "big 5" section" of this park. On route through the lower section - zebra, ostrich, red haartebees, squirrels - all on the main road to the tunnel.
Sure enough cheetah still lying and lifting his head to watch the security gate open and close. Perhaps he did think he could "escape" to the lower section. The vegetation changes dramatically on the climb to the Sentech towers but we did see the most beautiful giraffe family. Baby still had the tufty fluffly horns.
We saw our first mountain reedbuck - frantic searching in the mammal book for this strange looking combination of one colour on head and neck to a totally different body. Klipspringer also did a quick hop for us.
So we did the climb to the top of the mountain and on the way back down spotted the elephant. We counted at least four hiding in the thick bush but with binoculars as they were quite far in.
Back down in the lower section - lovely picnic spot with braai facilities. Good if you don't want to go all the way back to tented site.
We saw different herds of zebra, more giraffe families, impala and although we didn't see the rhino, the most amazing bull kudu - three huge males with horn spans so much wider than their bodies. Females were also out and about.
We were in a sedan car and you are now allowed on more roads than previously mentioned in the web page. We had to leave for the long journey back to Randburg - groan!
Enjoy your tented camp site - it looks so peaceful and we are sure you will not be disappointed with the wildlife. Looks as if JoelR and I will be fighting over your accommodation if you decide you don't want it!