If it is a landing, you probably won't be able to stay in the zodiac; they are often used to shuttle people back and forth to the ship. And even if they aren't, it would be better to get off and find a a clean boulder with a good view of the scenery and wildlife and sit down and enjoy being in Antarctica.

That said, my experience was that there were always a couple of options for things to do once we landed - from easy walks along the beach to relatively more difficult ones that might require walking on scree or hiking uphill. You can pick the activity that works best for you.

Not sure how big a ship you're planning to go on, but in our case (48 pax) not everyone stayed on land for the duration of a landing. Those who wanted to return to the ship early were accommodated and shuttled back when they were ready to leave.

Can you give us a sense of the problem? Walking, getting out of the zodiac, etc.

I just got back from Antarctica yesterday. I have a bad knee, but was able to do everything I wanted to. As Jed said, it would be good to have a sense of what the problem is to give advice.

Nevermind - will you be posting a review? Would love to read about your trip.

We are on a ship of about 100 passenger. I develop muscle pain in my legs after walking for a while. I also have a semi-bad knee, so I was curious how difficult some of the walks might be. I appreciate your responses.

I did a small 100 passenger trip about 3 years ago and never had a problem. There was always a choice of how strenuous you wanted your excursion. I think what would really help you is a walking stick. I tried one in the Galapagos and was amazed how much it helped me - the most advantageous thing about a stick is the stability it gives. I had so much more confidence on rugged terrain. Perhaps they already have them on the ship - you might ask.