Thanks a lot for the detailed advice, Velo Dog; and I really enjoyed our pizza and beers the other day.
I've never used a range-finder on a game animal--never thought I had time; but then I'm not a long-range shooter. I like to carry the rangefinder to check my own guess of distance. I'll judge a tree or rock at, say, 150 yards, then shoot the tree or rock with the rangefinder. I find this helps improve my own judgment of range, and I expect the country to look different on the Eastern Cape and in Zambia than what I'm used to. But maybe I'll leave it behind if space is tight.
Yes, I was going to wear one pair of boots, just to make it through the airports. I have a bone spur on my right foot that requires me to wear moderately-heavy hiking/backpacking boots. I know they won't be quiet, but without that kind of boot I can't walk far at all.
Neither of the rifles I'll be taking have open sights. And the two scopes aren't interchangeable (one-inch and 30mm). One rifle is a .300 WM, for the eastern Cape, and the other a .416 with which I hope to shoot a buffalo. So the two rifles aren't really interchangeable either. Both rifles wear new scopes, which haven't been used enough to reveal any defects. That's why I include a spare scope and rings.
I had to submit a copy of the SAR outfitter's invitation letter with the SAPS permit application. Do I need to show an additional copy too? The Zambian guy says he'll get the permit and issue an invitation letter. I will carry copies of both with me.
I feel sort of obligated to take the Camelback. Our son gave it to me for Christmas for use on this trip.
Both outfitters mentioned camo clothing (along with dark olive, etc), so I assume it will be okay.
I read in a couple of books you should take a pair of gaiters to keep ticks and seeds out of your boots. I ordered a couple pairs of these:
http://www.midwayusa.com/product/112445/boyt-shumba-safari-gaiters-canvas-khaki
You have some great ideas I haven't thought of. Thanks again.