I'm leaving for my Botswana/South Africa trip tomorrow. I'll be bringing a 30D, 7D, 17-50 2.8, 100-400L, 38GB of CF, 320GB external HD, 120GB Netbook, and an old PowerShot.
I'm seriously contemplating a tripod/monopod/both. The 100-400 is a rental and I spent the past couple of day shooting with it and boy does it take some getting used to. The lens in incredible, but I'm definitely worried about low-light situations. I could really use the extra few stops. I'd also love to take some long exposure night shots, as some of the camps we are staying at overlook some beautiful landscapes. Weight, of course, is an issue, though. Seems like there are quite a few conflicting opinions on whether or not a tripod/monopod would get much use, especially during drives. Oh... decisions, decisions, decisions...