I've seen a lot of posts about packing light and just getting t-shirts from the vendors at the expo. I'm actually going to miss the first day of the conference and will arrive on Tuesday. Is there a chance I'll still be able to load up on shirts from the vendors on Tuesday? Just trying to decide if I should take a chance with packing really light. One of my airlines is charging for carry-on, so I'm trying to find ways to save. Thanks.