Hey all, Britton here. As far as I know, the Meet and Greet ticket you get is what you use to get your paper ticket into the venue. Once you have that ticket, it shouldn't matter whether you want to be there at front of line or come back later. The front of line access is just another perk we're offering the street teamers etc. The only ding you might experience is needing to wait in line because they've already grouped the "front of line" people.
Does that make sense?