Don't conflate RSA with all of Africa.
As of yesterday, only Botswana is completely closed to non-Botswana citizens/resident card holders, other than logistical/transport (truckers) workers.
RSA is open to basically RSA citizens and regional African countries and limited non-leisure (business) international travelers with limitations/requirements stated above. US passport holders, as well as others CAN transit through Johannesburg Airport en-route to another country. Travelers just can NOT leave the transit side of the airport. Means no overnight stay a the City Lodge Hotel, Protea Hotel on the airport grounds or other off airport grounds lodging.
Southern African Countries currently open to business and leisure travel (tourism/hunting) are Namibia, Tanzania, Zambia and Zimbabwe that I am aware of, if you can sort out the airline transport in/out.
There are US guys going to the "open" countries for the past few weeks. As in all things, if an individual feels/believes the risks are to great, by all means don't go. This will be pretty much all moot in a few weeks as most of the "open" countries hunting seasons, with some private land exceptions and non-regulated game species, will be generally closed if not closed already. Most countries "official" hunting seasons won't begin again until Feb-Apr of 2021, depending on the country.
If someone is interested in booking for next year to lock in some really good deals, I'd say do it. Just make sure the outfitter doesn't require a "non-refundable" deposit or maybe willing to wait until 3-4 months before you actually arrive to wire over funds/deposits. As bad as the operators over there are seriously hurting financially, the reputable ones will understand the client's trepidation and "make a plan" that you both can live with.
