I'm going to play devils advocate..... and prick some aspirations... and offer some very synical and jaded perspective.... sorry...
First up, good photographers take good photos, NOT 'expensive cameras'.
Wildlife photography is one of those genres of specialisation, in which, trawling my memory for the author I cant, but one of the top wild-life snappers once commented something like, "It takes 1/100th of a second for a camera to make a photo.... it takes MONTHS for the photographer to get to that point...." as last comment, it's the photographer that makes the picture, all the camera does is record it. For wildlife, you need to know your subject; where to find it, what time of day, how it feeds, where to be to get the best back-ground and not get eaten... etc etc etc. You dont just drive up onto the African Savanah, and have lions come up to greet you and ask "So what pose would you like today, Mr Bailey?" On a package safari, you have guides and experts on the fauna, who can 'sort' of take a lot of that planning and set-up out the game fort you; they make thier living showing folk the animals, they aught know where to find them; they probably also know where and when they make a decent snap, and set things up so all you have to do is point and shoot......
B-U-T... do that and you will get pretty much the same snaps as dozens of other tourists each season, you may as well buy the post-cards.... in the mean-time, put the chuffing camera down and enjoy you holiday! Not easy to out-run a lion when you are too busy trying to pick up that expensive 700mm lens people told you was absolutely essential to the task!
Rather cynical, But DO think about it...... good photographers take better photo's NOT more expensive cameras.... takes years to learn the basics of how to get the best from a fancy camera and start becoming a better photographer..... you have what, a few weeks? And a google-connection..... yup... my money's on the lion..... you'll have your head in the camera hand book, or be trying to find a you-tube-tutorial, when it charges! If you buy a fancy camera, and if you align expectations and dont expect to get shots like are on the cover of nat-geo.... you still have an enormous learning curve 'just' to learn how to use a new camera.... and I get sick trying to read on a coach, let alone in the back of a bouncy old Land-Rover!!!
Photo's that will have most 'meaning' to you when you get home, will be the happy-snaps of your family and travel-mates, with a bit of the scenery behind.. that begs a more generic snap-shot camera, which you probably already have, likely in your smart-phone.... a-n-d you likely are already familiar with how to use it......
Which is all to pose a proposition, that you have left it too late, and are trying to cover all your bases with one beach-towel..... and probably DONT need a new camera, and rather than a new camera 'adding' to your holiday, it's as like to detract, as you faff trying to get to grips with it and miss the gazelle bounding accross the track into the trees..... "What Camera" at this point, is quite likely a non-issue.... doesn't matter what it is or what its got or what it cost, if you dont know how to use it, or aren't pointing it at something photo-worthy when it happens...... ANY camera, that does the job, is the right camera... question REALLY is what's the job? And then, are you the right man for the job? Pro's do it for a living; they know the ins and outs, have years of practice and bags fill of gear to do it... and their photo's are cheap and widely available in the gift-shop, on post cards in the books, heck you probably already have a good number of them in the holiday brochure! So think not of the giraffe and elephant... that they can and have taken many many times, far better than you ever will, and contemplate the stuff that they cant get or wont get, like Auntie Mable loosing her knickers in the bar! (for whatever reason!)
May save you a heap of money, as well as frustration, trying to pick the 'perfect' camera to really NOT get even a fraction of what you hope for, even a fraction as good as you hope... A-N-D let you enjoy the holiday, and the scenary and actually being there, not peering at it all through a peep-hole or on a little LCD screen little different to your living room with the central heating turned full on!
As said, its devils advocate stuff... but WHY are you going on holiday? To relax? To have a change of scenary? To experience a different culture? OR... to try take pictures to impress your work-mates and neighbours? The camera should be your companion in travel, NOT your reason for travel...... back up a bit, and re-evaluate just how important getting photo's on this trip really is, and IS a fancy camera REALLY the 'best' way to obtain them.... think post-cards, think nature books, think gift shop..... and what is and isn't in them......