Collect 8 Coils of Kvaldir Rope.
Survival kits never have any rope. It makes no sense! Rope and bombs, that's all they should store. The rest of this stuff is just a waste of space.
Except maybe the balloon. That's coming in handy right now.
I bet those Kvaldir have rope. They're always riding around in boats, tying knots, dressing in nets. Go take some rope from them! I must have it for our plan to work. It is non-optional.