I can understand the disappointment of many, particularly those coming from overseas.
There is usually lots of planning involved and certain expectations.
A few suggestions from my side, as a frequent traveler who seldom braais. (as much as I love the taste of a good braai). I am also probably the world's laziest cook, so I do understand your reluctance to spend time preparing food.
A good cooler bag is essential for traveling from camp to camp. I freeze water or isotonic drinks to keep the food from going off. It then offers a ice cold drink when reaching the final destination. I usually buy a smaller six pack cooler bag and fill that with frozen drinks as well.
I usually buy barbequed chicken and buy fresh rolls and salad for my first night at the nearest SPAR. It makes for a simple and tasty light meal for the first night. Ice cream can be found at the shops.
Woolworths has introduced ''tinned meals". I have never tasted them but I was thinking of trying some for KTP. Their hot cross buns also keep very well. I also enjoy the numerous cheese platters they have available and I do find that they offer variety and tasty snacks.
I do find that snacking on macadamia nuts keeps hunger at bay. They seem to keep blood sugar levels constant and have even been recommended for certain high protein diets. (Don't eat them with very salty snacks as these are usually high carb and increase thirst.) A couple of handfuls of these nuts can be exceptionally filling.
I have found the SPAR shops close to the various gates offer good ready prepared meals at a very good price. The roads to the gates can also offer great sightings. The money saved can go towards an extra night drive or morning walk. One of my best food memories was of a freshly bought SPAR meal bought at Phalaborwa and eaten at the Masorini picnic site.
Personally, I find that the heat can effect my appetite. An oily supper makes the early waking less enjoyable. I always keep tinned peas that I mix with a bit of perinase and cut up bits of cheese and fresh onion. (red onion if available) I also add tinned corn. Its easy and pretty filling.
I am also going to say that as much as this has been a disappointment, to try to turn it into an adventure. I find that if I see the possibility of making a disappointment a challenge... I become richer.