How important are waterproof clothes on safari?
You are travelling during the dry season but there can still be occasional thunderstorms and you might catch one, some places have more than others. However mostly you are near a vehicle, the rain is not freezing, and you’ll have dry clothes to change into only an hour or two away at most even if it rained at the most inconvenient time. The risk is very low and the inconvenience minimal, so why carry rain-gear around all the time? But I’d feel so bad if I told you not to bring a rain jacket (or whatever clothing you felt you needed for rain) and you had occasion to use it, and blamed us for not mentioning it.