So I ran across this today:
I've never heard of this! They set up chartered flights to away games (this year: Iowa and Wisconsin) that's basically like an all expenses paid cruise to the game. Free in flight open bar, chartered coach to and from the game, and obviously, chartered flight to and from the cities back to Willow Run.
Unfortunately, the cost (549 - 599/person) is pretty steep and doesn't include the ticket to the game, or any bonus food at the game (obvs.)
If I had the time and the money to do it, I absolutely would, just to see what it's like.