So, given that to my meagre experience, getting rid of unwanted shadows normally means fill flash, (which I guess is the point of the better beamer for long distance) either use of the flash gun on safari is so second nature that it not worth mentioning or, it's not mentioned because generally it's not used...
Do you understand my point? Am I so inexperienced that I'm missing something really fundamental here?
It sounds like you've done your homework. Personally, I would at least take a flash and probably a better beamer-type device. But, then again, I'm not going on my honeymoon!