"I would bring a spare change of clothes or two, rather than something specifically for sleep."

She advises, watching him ramble with wry amusement.

"You don't know if you will have time or space to sleep in anywhere but the open, and a spare, dry set will do you better than things for sleep which you may have no chance to use. Perhaps consider a light cloak, in case it rains, although you have less chance of that, I think."