I have a 6am SFO-DFW flight and now I'm thinking of standing by for the 00:15am one (same calendar date). I've read this thread and from what I understand I shouldn't have any trouble doing this (for free). But how do I get past security at SFO at night? Will I be able to print the 6am BP and can I use that to go through security? I normally OLCI and print the BP at the airport and I hope I'll be able to do the same thing for this trip.