Mana Pools in Zimbabwe is amazing for Honey Badgers, several visiting every night, but that information isn't much use to you.
I have not seen Honey Badger at Etosha if my memory serves me well, but I have certainly spent a lot more time at the Okaukuejo camp than the others and I suspect Halali is the one that most regularly attracts Honey Badger. Not hinting you should violate park rules or feed the animals, but if you should accidently leave scraps of your dinner under your car, with plates and tins propped above, they will wake you during the night with the din