I'm in the process of selling off some older/less-utilized gear (which will include two of our 7Ds and possibly my trusty 1D3), and realized that I'm going to have to "backfill" at least one of those cameras, and it needs to be something my wife wants. She wants a second 5D3, and in my head that makes sense (I have two 1Dx, she'll have two 5D3; for events where we each could use a high-rate body, I can take a 5D3 from her and she can take a 1Dx from me, similar AF logic, etc.) That in turn simplified my camera selection process: since she said she'd prefer a 7D2 for the Alaska cruise, my plan is to buy a second 5D3 with the proceeds from selling 2-3 bodies and 2 lenses, and rent a 7D2 for her for the cruise. After that, hopefully she won't miss the crop factor, and I suspect I'll need to buy her a 70-300L or perhaps she'll actually take a liking to the 100-400II.

As I see it now, it comes together rather well.
When we're relaxing in the room but on the lookout for whales: 5D3 and 11-24, 5D3 and 24-105L, 1Dx and 100-400II, 1Dx and 600&1.4x
When we're walking around the ship, daytime: 5D3 and 11-24, 24-105L, Zeiss 50/2 Macro in a Shootsac
When we're walking around the ship, nighttime: 1Dx and 14/2.8II, 35/1.4, 85/1.2II, Z50/2M in a Shootsac
For formal portraits in less-busy places: 5D3 and 35/1.4, Profoto B1 and 1x3' softbox

Three daytime excursions (bear/wildlife hike in Ketchikan, glacier viewing in Tracy Arm Fjord, whale watching in Juneau):
Me: 5D3 and 16-35/4IS, 1Dx and 100-400II, 1Dx and 600&1.4x, Z50/2M handy in a lens exchange case
Wife: 5D3 and 24-105L, 7D2 and 70-300L, Canon 11-24 and 100/2.8L IS Macro handy in a Shootsac
One premium daytime excursion (private photo tour in Haines via Skagway, guide has vehicle where we can store stuff):
Above plus 35/1.4, 85/1.2, 70-200/2.8IS, Profoto B1 possibly

One evening/nighttime excursion (orca watching in Victoria BC):
Me: 5D3 and 24-70/2.8, 1Dx and 70-200/2.8IS, 1Dx and 600/4 (no 1.4x TC), 14/2.8 and 35/1.4 in lens exchange cases
Wife: 5D3 and 11-24, 7D2 and 70-200/4IS, 24-105L in Shootsac

I'm still on the fence about the 17 tilt-shift. I really like it, and think we could use it here and there, but it's not making the list for much of what we're doing so I may skip it (again)...

Any commentary on my (tentative) plan? I've sketched out the "load plan" and it all fits in our two backpacks plus the 600/4 and 70-200/2.8 in a rolling duffel we'll carry on. The laptop bag will ride on the handle of the rolling duffel to handle memory card duties, and my "semi-famous" SSD plus three HDDs will be spread across various bags for safety.