Many, many years later, but for future reference, there is a very nice lodge with a campsite, just north of Kang - Kang Kalahari Rest Stop. I always stay there when I overnight in Kang. There is a pool, and a restaurant (bookings recommended), the drinks are always cold: https://kalaharirest.com/
Nothing wrong with the stops in Kang town, they are clean and convenient. Kalahari Rest Stop has more of a safari atmosphere but an extra 15minutes of travel to get there.
The list of accommodations in Ghanzi are spot on, I always stay at Dqae Qare that is owned by the local c it is a detour to stay there if you are heading from Kang towards Namibia.