Take the 600mm and the t-Cons. (or the 400mm DO) but if you got the 600mm, then that seems the one to bring.
Now comes the first question, what body/bodies do you have?
If you can lay your hands on a 100-400mm, I'd take that, but if not take the 70-200mm.
Whn i went, I took a Canon 500mm packed as decribed below, it spent pretty much 100% of it's time on one body, the other body sported the 100-400mm most of the time, or my 17-40mm for landscapes.
If I packed my 24-70mm, I don't recall using it once.
Take your 16-35mm
The only maybe is the 24-70mm, but frankly you could take it all and just leave the DO at home.
Here's how to pack it,
Forget about taking your camera bag on the plane, stick it in the checked baggage empty.
Get a good roller luggage with the collapsible handle that is legal for international overhead storage bins in a bright color.
Gut it and strap the 600mm to the rails that hold the collapsible handle.
then pack all your other stuff, bodies lenses into that same bag around the 600mm.
Wrap each item in t-shirts, underwear, socks etc..
Now your carry on has all your important camera gear, and your emergency change of clothes.
Pack your camera bag you want to work out of in your checked bag.
And HAVE FUN!!!!
The 500mm was my most used lens,

