Thanks for the heads up. Reading the other threads, it sounds like I should play my luck. I know I can always check in the bag for free, but I'd rather not. I will do online check in and try to pass security with my 45 liter bag. Then, if they force me to check it in, can I gate check it or will they hassle me further?

Also, how early should I arrive at AEP if I'm preparing to do what I describe above?