How have those who've taken the Botswana, South Africa and Zambia trip handled ensuring 1. camera gear and bag didn't exceed 16 lb carryon allowance and 2. Preventing taking the bag and gear from you on the in-tour flights and putting them in the belly of the small plane rather than letting you carry the equipment on the plane? My most likely assortment will be a body and three lenses, any required filters, a small tripod, and required chargers and needed accessories (extra memory cards and external hard drive, for instance). The largest lens will be a 70-200 with a teleconverter attached. Additional items may be a small laptop/charger and binoculars.
If you have tips regarding what were the most useful and least uses lenses, that would be great. Any tips on how you packed gear to ensure meeting your photography requirements as well as the tour weight requirements are appreciated. TIA