I went like 15 years ago on a cruise ship out of Ushuaia Argentina. It is true that there are only so many hours where you're off the ship. We visited outposts that various countries have, and we also visited completely wild locations. We left on January 20 (the middle of summer), and it wasn't really all that cold...the picture below was just one night where we walked out on deck just to have a look around. I wouldn't stay out there for an hour, but it was fine for 10 minutes. We departed Ushuaia on Sunday evening and on Tuesday morning I was swimming at Deception Island, so not much time to cross the Drake. It wasn't that rough either, to my disappointment. There were higher seas on my last Atlantic crossing, thanks to a hurricane.
The only "weather" related thing on my trip was that we didn't get to go all the way through the Lamaire Channel. We started in, then the captain chickened-out. It was due to too much ice, he said.
The ship was only about 22K tons and had a passenger capacity of 800 or so. Pretty small when compared to most more modern cruise ships.
There were quite a few different birds, including several varieties of penguin. Got to see some up close while walking around, but we were instructed that if the animal changed behavior due to our presence, we were too close. Saw leopard seals, whales, and stuff. But the thing that's always there and always amazing is just the bleak environment. Just can't describe it.
As to the "gear", they wanted you to bring your own boots. Some people left them, but I brought mine home. All the tourist were given and had to wear a red coat. I just brought a few turtle necks and some insulated underwear.
As to the price, it probably doesn't make sense for me to quote mine since it was so long ago. It looks like it was $5070, all-in, including buying the boots. That's splitting a cabin with my BIL and Dad. Inflated at CPI-U, that's $7061. That's for 8 nights on the ship, I guess. Red eye from Miami is included and I think a shore excursion when we returned to Ushuia.
I know of a fellow who went there once.
His ship got stuck in the pack ice, was crushed and sunk. He and the crew were stuck on the ice for 5 months before the ice broke up and they stuck out for an island in life boats.
They got to the island but it was deserted. So, he and a couple of folks sailed 800 miles across the Antarctic ocean in one of the life boats to an inhabited island with a whaling station.
Amazing! I know of that fellow too! Was quite a few years ago, as I recall. In fact, I don't think they had perfected the bi-plane yet, so no air rescue.