Does your Red Oxx lock? That’s going to be a requirement for me.
i spent about a week on safari in Kruger and Vic Falls living out of a duffel about that size, without problem (the local travel agency held my larger suitcase containing the clothes and shoes I used For CapeTown and the wine country), but storing a suitcase is not an option this time, and I’ll need to include hiking boots & garden gloves for Rwanda, plus some resort wear for Zanzibar, so I’m going to try to maximize volume, I think.