Antarctica Expedition and Ushuaia February 2020

A long wish comes true next February (2020) I will go on a Antarctic-Expedition with G-Adventure.
Anyone here has done already such a "cruise" ?

Anything you wish you had know before you went on the adventure ? (and yes; I know about the temperature and sea sickness precautions).

Also before the trip I will stay for 3 days in Ushuaia; as I pass already trough before that I probably will have done
already Tierra del Fuego and a Catamaran Cruise to the Island of Martillo. And I also know about the former jail which is now a ship museum.

Anything else I could do in my time there (except washing my clothes before I board the ship) ?

It sounds like you already have enough for 3 days in Ushuaia. But if it interests you there are glacier ascents you can do there, the Martial glacier being the most popular one. Also if weather permits there is kayaking on the Beagle channel, but only for experienced kayakers.

Antarctica is truly one of those once-in-a-lifetime things. You won't regret it. And you will discover that it is nearly impossible to explain to someone who hasn't been there.

Let's see. Plan on layers. If your cruise doesn't supply them, waterproof pants are a must. My usual outfit for excursions was two layers of lightweight thermal pants under the rain pants. A thermal shirt, a t-shirt, and the heavy duty jacket supplied by the company. And I am someone who acutely feels the cold. I brought fleece pants to wear under the rain pants, but found them too hot.

I wore sock liners under heavy sick for expeditions. Washed the liners daily, because they dried fast.

The best thing I brought was a thingie called a neck gaiter. Wind can be a big issue. With this thing, you can breathe through the cloth, but not get clobbered by the wind.

You can rent gear if your cruise doesn't supply it.

For wandering around the ship, I wore one pair of thermals under knit pants, and a thermal top under a Tshirt. Be prepared, though, to grab something warmer when there is an announcement that something neat has just been spotted and you need to run out right now to look at the pod of orcas that just showed up..

You might get lucky. A crew member described the Drake Passage sea on our trip as "pathetic."

Sunglasses, definitely. For both sun and wind. Two pairs of gloves--one to wear and one to be drying. Sunscreen always.

You are about to go offline. If your ship has an internet connection, it will be a slow and very expensive satellite connection--just enough to tell people "Hi, I am here. Safe and sound. Amazing place. Talk to you later."

Binoculars. You want them. Bring a small, lightweight pair.

If you have a camera or something that is battery-powered, cold weather can deplete batteries in a burry, Bring spares.

When you are ashore, you can't leave anything. That means anything. If Mother Nature calls, you need to go back to the ship (and the crew will help you). Plan your coffee/tea consumption accordingly.

Penguins are really smelly.

@mstep - you think you miss understood me: I travel Patagonia on a tour before I go on the Antarctica Cruise and on this tour I will already pass Ushuaia and do during that tour, what I wrote in my Original Post, therefore after having done that I will need more ideas to pass the 3 additional days when I will be on my own between finishing the tour and starting my Antarctica Adventure.

The Glacier ascents are one of the ideas I didn't know about yet and will do a further research.

Thanks so far; lots to bring and I'm (as I've read) only allowed to bring 15 kg on the flight with the Argentinian Airline...
I will need to loose weight as much as possible..
I've got a big camera with a big lense (400mm) so I think I can use is as a binocular, so one heavy item which I anyway will have in my carry-on.