He's about to say no, but changes his mind at the last second because... kind of?

"Eh, I guess you could say that."

The roof is forgiving enough to let him sort of crawl/clamber his way up to sit on the very top of the roof, so he's not sprawling over it. His dignity died a while back, so he doesn't try to make it elegant or graceful, just efficient.

"This was the safest place to sleep. In case of bears." He kind of smiles at that, because it's all pretty funny now.