A combination of Chitabe and Tubu Tree is great or Chitabe and Little Vumbura. These are two great Delta combinations but none of these camps are in the Chobe/Linyanti ecosystem so you may want to consider Chitabe/Duma Tau or Tubu/Savuti if you want two ecosystems. The charter companies in Botswana will fly to Namibia but this is not a scheduled flight like the camp-to-camp flights in the Delta so you will have to pay for private use of the aircraft. This could be cost-prohibitive depending on your financial situation.
hapywandr - GeoEx is a great company. Their Africa Director is a friend of mine. Her name is Starla Estrada so maybe you worked with her? She is good friends with our Africa director that also lives out in San Fran. Cool!
Craig Beal - owner - Travel Beyond