This could be a full blown tent, or a simple tarp with means to pitch it. Remember that you will probably already be carrying trekking poles which could be used, and a length of rope does not weigh a ton.
The conditions during the Frozen Otter can be life threatening if an emergency occurs. It is essential that you are able to escape the elements while waiting for help.
I came across this website with a lot of different minimalist/survival shelter ideas. I encourage everyone to take a look at it and think about how you would construct your shelter in case of an emergency!
If you have any questions about your shelter strategy, don't hesitate to ask.