This is the classic issue I am also wrestling with now, in preparation for our June 2023 cruise to Alaska. I am also a Sony photographer, with both full-frame (A7RIV and A7C), APS-C (A6400 and A6000), and 1” sensor all in one RX10 MIV (24-600mm). My last trip to Alaska in 2016, I took my full-frame rig (A7II and A7RII) and took three lenses: FE 24-240mm F3.5-6.3 OSS, FE 28-70mm F3.5-5.6 OSS, FE 28mm F2 OSS. I took about 3,000 pics and all but 50 were with my 24-240mm OSS lens. Throughout the trip, though, I felt I didn’t have enough lens a lot of the time. Frankly, looking at my pics, I was either in the 24-50mm range or the 200-240mm range the bulk of the time.
This time out, I’m not taking my full-frame gear, primarily because I am having a lot of shoulder issues and I need to keep the weight down as much as possible. So I am taking the following:
Sony RX10 MIV (Zoom range 24-600)
Sony A6400
Sony A6000
Tamron 17–70mm F2.8 Di III-A VC RXD (stabilized)
Tamron 18-300mm F3.5-6.3 Di III-A VC VXD(stabilized)
Sony E 10-18mm F4 OSS
Sony E 18-105mm F4.0 G PZ OSS
These are all compact, OSS lenses, including the Tamrons, since my two A6xxx cameras are not stabilized.
If I were going with my full-frame gear and weight were not a problem, it would be:
Sony A7C
Sony A7R MKIVA
FE Zeiss Vario-Tessar *T 16-35mm F4.0 ZA OSS
FE 24-105mm f/4 G OSS
Tamron 50-400mm F4.5-6.3 Di III VC VXD (FE) (stabilized)
FE 35mm F1.4 GM
In summary, based on my experience you need and will use wide (17-35mm) and long (200-400mm) more than anything else, so if you can take anything longer than 200mm, it will really help. I am seeing great reviews on the new Tamron full-frame 28-200mm f2.8-5.6. An all-in-one lens works best so you are not changing lenses all the time. In addition, everything I am taking is weather-sealed.