If i were the only one on a large a/c I would sneak into FC and sleep soundly. I would tell the flight attendant that I'm feeling a bit under the weather etc. I bet they would let me up in F/C and who knowes maybe they would have some meals catered. You know as they say a free upgrade to F/C brings more business to the airline. So if they lost money on this trip I would upgrade next time. It's like when you sample coffee you are mroe than likely to buy the brand of coffee like at Starbucks.

Plus what else is a flight attendant supposed to do in F/C? I would have the time of my life having many flight attendants cater to my needs. Hell I bet the pilot would let me up front during the flight if I'm the only passenger and I ask nicely. And the cool thing is my luggage will be off the plane in no time.