Just returned from a 4 day Cape Town / Verneukpan / Cape Town trip. Lots of sand and mud. In our group of 3 we had a pig 1150 Adv, 990 Adv, F800GS, and a good 10 spills or incidents. Fortunately, we were there to help each other pick up the bikes or lift it out of mud, so the burden of the weight was shared as we helped each other. Apart from being shaken and confidence levels dropping, there were complaints of heavy bikes to pick up. Fortunately a boxer only leans over so much☺. For the distances covered and speeds achieved smaller bikes might have complained, and it is comfortable to have an 800 ambling along at 4000 rpm at a decent speed instead of a screamer working hard all the time. Smaller bikes would have handled the sand and mud better though (less spills?), but then one would have had to do a mind-shift and travel slower and lighter, and perhaps provide for more travelling days. Keeping up with traffic close to the cities is important as well. You should be able to go 130 on the N1 for extended periods. Choices, choices...