Main issue seems to be your desire to make this about photography as opposed to the experience.
Not at all. Photography is a significantly tiny part of this trip. Look at the site - how much is photography discussed? Barely. It
is all about the experience.
Want to learn how to capture that experience? That's where the photography comes in.
You really think it’s impractically difficult with basic food and camera gear?
Absolutely. Ships in Antarctica do not allow and/or do not accommodate kosher food - just see
@Dans experience last year. So unless you plan on living on crackers for a 10 days, yes, it's "impractically difficult".
but the issues and risks you mention don’t seem insurmountable.
You're in Antarctica and the incoming plane is delayed two days. You get kicked off the ship (which is starting a new cruise as soon the plane lands).
It's Shabbos and your options are remaining alone on a rock or taking the plane back.
This sort of delay happens so often that all fly/cruise trips have a fine print contingency plan that states that in case of a delay they will give you a bus tour of Patagonia instead.
Are you willing to take that risk?