Off topic: if you have to sleep with your head out from the plastic to prevent condensation, Pack along some extra cough drops, nothing gets me down in the morning like a sore throat!
I just have one word to say about that: scarves.
OK, more than one word. I would rather have a scarf than a hat. You can wrap a scarf around your head, but you can't easily wrap a hat around your neck.
And roger on the cough drops. That's item #13 in my PSK.