Okay, I had to think long and hard on this one. I know it is not easy to fly these days! So here is what I am doing.
I am allowed one carry on bag, and one laptop case. So here is my carry on:
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The above carry on will fit under the seat.
Here is the contents:
D800 body
D700 body
14-24mm f2.8 lens
24-70mm f2.8 lens
70-200 f4 lens
In my laptop case, I'll carry the laptop, memory cards, extra batteries, and the chargers.
I have a backpack that is too large for carry on, so I will fill it with socks, etc. and check it in as luggage. I will also check in my tripod. When I get to the ship, I will transfer the camera gear to the backpack.