Blain,
I believe Steve's post clarify's most everything. And, I'd suggest you re-evaluate thae amount you budget for a gratuity. In Tanzania, you will be tipping the PH, the trackers, the driver, the skinners, and about 5-8 others who do the wash, attend your tent, heat your shower water, night security, do the laundry etc. I think you should be thinking $1,500 as a begining minimum.