no sewwing abilty/means, so I'm stuck with what I've got. I think I'm just going to go with renting one. Its a month long trip in the Yukon, so I'm guessing water and condensation or going to be huge issues with down. And it might get that cold, were going to be doing some mountaineering.
If they thought it was inadequate they would force me to rent one, maybe I'll bring it and see.