The Linyanti area is particularly good. I made some comments on this thread-
but you won't be there at denning time so there is no predicting which particular camp will be your best bet, but any of the following:
Lagoon (Kwando Safaris)
Duma Tau, King's Pool, Savuti (Wilderness)
Selinda, Zarafa (Great Plains Conservation, but marketed by Wilderness).
See my recent trip report for my experience at Duma Tau,
I hear Chitabe and Vumbura are also good, but I haven't been to those areas.
Other than that, I've seen dogs before in Chobe, Savute and Moremi but the Linyanti region seems to have the most consistent sightings.