I wouldn't leave the bag at baggage claim, actually I wouldn't do any of what is described in this thread but if you must, I'd make sure you grab your bag. This would mean you'll be stuck landside though. The only good (well, less ridiculous) method here is to check the bags all the way through, its pretty easy and shouldn't matter that its two reservations they should still be able to do tag them through.

This sounds like a really bad idea all told though, you do realize the 747 isnt going away this year, this seems like a ton or effort, time and lack of comfort just to sit on a 747, and please tell me you're upgrading cause if you're doing all this to sit in the ghetto-Y that is 747 we might need to have your head examined