Mrs Bull and I are travelling in Africa with very low luggage allowances. This has forced us to consider carefully what we should pack. As a result we have rediscovered the joys of packing light and not taking anything we will not need. So many times in the past we have packed something we “might just” need simply because we had not used up our luggage allowances. Our bags for this trip weigh in total around 20kg which includes quite a few kg of camera equipment. So my advice - buy a small (say 60 litre) soft sided bag without wheels and enjoy the freedom of being able to easily carry your own bag.