OK, heres my two cents. I actually keep taking less stuff every year. If I took it twice and didn't use it, I don't need it. I also like to travel as light as possible. If you are only hunting in the Northern Territory where the buff are, it will be warm, it is well inside the tropical zone, so even in the middle of their winter it still may hit 90 in the middle of the day, the air is VERY dry though so in the shade will be comfortable. In still can be cool in the morning, especially if you are in an open vehicle. Also the sun is very strong, so most folks need some protection from it. You can hunt in shorts, but most don't. I generally wear camo tee shirts and the bdu type camo pants, with the cargo pockets. I do take a small fanny pack, but usually leave it in the vehicle. A light jacket for mornings is nice. I also take a couple of old tee shirt to wear in camp etc. and then I can just leave them to lighten the load on the way home. Where I hunt we take an extra gear bag, large size to bring back capes and horns as checked baggage, that alone will save you quite a bit over Africa. I shot a buff in April and had it hanging on my wall in August!
I take one takedown recurve with a spare set of limbs. I can use the same arrows with either set. If I was going for two weeks on a buff hunt I would take at least 30 arrows and glue etc. for repairs. I usually only take about 5 practice arrows and I can change the heads on those. A soft case to protect your strung bow in the vehicle is nice. I pack the bow in a soft case inside of my gear bag for the flights.
If you have more than one guy going you can divide up the spare stuff such as string wax, super glue, leatherman etc.. One small flashlight is enough, you probably won't even use that. Bulk is as big a problem as weight, sometimes more.
Crocs and snakes are not a problem, you probably won't even see either one, you will see cane toads though, don't lick em!
Ric