I think we are set...

We picked up a totally collapsible rolling duffle that is a legal carryon. Samsonite on sale for only $29 at our local luggage store.

Current plan is to use two K&D duffles packed to exactly 44lbs; legal on all flights including domestic SAA, Singita, and Vic Falls on Nationwide. (Ngaire, are we in Economy or Excutive Econony for fligths to/from Vic Falls?) We would then use new rolling duffle and camera bag as our one carry on each. SAA and Nationwide each limit carry on to 7Kg (12 Kg if executive economy). Ngaire, can we use the rolling duffle as carry on to Singita if less than 7Kg, too?