Remember when Mr. Brown was Gov. of Calif. One of the many stories they told on him was he would sleep in the asile of certain red-eye flights. At that time, before he became Mayor of Oakland, he had a nickname of Mr. Moonbeam. Soooooooooo if it's good enough for the "Gov", why not you?
Of course he had blankets, pillow, etc. I am sure but interestingly enough, this was supposedly in coach...I oftened wondered what others did to get access to lavatories in Y.