I have 6 more months to decide on my camera bag... for 7 day/night cruise and 5 days/4 nights at Disney.... Already starting the debate of what to bring and what to leave behind.
Just thinking outloud:
Sony A6300 + 10-18 for walk-around ultrawide. Likely also the 24/1.8, just because it it a high quality small lens, can use it for dark rides, can use it for walk around.
Nikon D750 with 45/1.8 -- for walk around and for dark rides.
At that point, my camera bag isn't too bad. But.... I need something for Animal Kingdom... Either the Nikon 70-200 for my D750, or a 70-200 for the A6300. (Need to test how well my Nikon 70-200 works with adapter on the Sony, or may need to get the Sony version).
Now the bag is getting full... But still some options to squeeze in a little more...
The Nikon 18-35 for top quality landscapes, especially sunrises and sunsets on the cruise ship? This would be a direct duplication of the 10-18 on the A6300 (equivalent of 15-27), but the quality of the lens/camera combo would be so much higher on the D750. So do I duplicate, just to have it for when I want the absolute best landscapes... or do I make the A6300 with 10-18 work?
The Rokinon 14mm/2.8 for Nikon -- Especially if I don't bring the 18-35, do I use the 14mm for some ultra ultra wide landscapes? And it adapts nicely onto the Sony where it's still a wide 21mm...
The Tamron 24-70/2.8 for the Nikon -- Do I really need a "normal" zoom? Or would I be ok, just with the 45mm prime? The 24-70 is the lens I use the most often. Not only a great quality lens, but the zoom range is very versatile for everything from wide landscapes to short portraits. It's the lens I use most often, and I'd feel weird leaving it behind. But there is something easy and freeing about just using the 45mm.. and then I wouldn't need to change lenses for dark rides. Just keep the 45mm on at all times. In fact, carrying 2 cameras... the A6300 with 10-18, and D750 with 45/1.8... could potentially cover most of my shooting without ever changing lenses.
Especially if I don't bring the 24-70, something for portraits? The Sony 50/1.8 for the A6300 OR the Nikon 85/1.8. The negative of the Nikon is the lack of VR, but it is a hell of a lens. And it should work well on the Sony with adapter as well...
This is looking like a very very different type of camera bag than I've carried in the past:
Full frame D750
APS-C A6300
APS-C 10-18
APS-C 24/1.8
FF 45/1.8
FF 70-200 (just not sure if Sony version on the A6300, Nikon version on the Nikon, or Nikon version on the Sony, will depend on adapter testing)
FF 85/1.8
Speedlight, likely
Hmmm, this was a helpful exercise..