Hi Bella and welcome to the forum,
I can't help with ride options but can confirm that the road conditions are all okay, tar all the way, but you have to choose the correct route. Of course there might be the odd detours for road constructions in Zambia but once cleared through into Botswana you would have to travel via Nata - Gweta to Maun which is about 600 kms, roads okay with some potholes but not to serious. (not demanding 4x4)
Hope you come right, in any case, I cannot recommend public transport as unrelaible and accident prone.
God luck and enjoy.
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