I only worked one year in Maun, so maybe I missed something, but I didn't think the flying was all that tough and I'm certainly no master bush pilot. It is a hard job, fast turn arounds, hot weather, long hours etc. But most of those strips are plenty long, the Mopane trees are nice and short, and there is no terrain for as far as the eye can see in any direction. Bush Flying Lite. It's not like people are hanging on the prop, crossing the fence at 65 in the van hoping to nail the threshold, you aren't landing on gravel bars or glaciers, just dirt runways. Fact is if a 250 hr pilot can master flying in bots after 50 hrs of poor quality instruction to the point where he is trusted to fly paying passengers it can't really be all that bad.
It is the most fun I've ever had in airplanes, I dig all the low level flying, and the 5 minute legs and the wildlife and I highly recommend the experience. It's a great first job. But don't try to big it up into something it's not.