Kenya's Masai Mara Game Reserve offers superb, year-round game viewing of large concentrations of animals, with the climax being the renowned Great Migration of millions of wildebeests and zebras.
Places like the National Parks in Tanzania are incredible, well worth the effort to see. We are the aliens there, these places are not man-made, they follow their own rules not ours. If you get eaten its because you made yourself into an available snack, not because of anything evil or even ill-intentioned. Just respect their rules.