I am getting ready to go to Seoul this coming Tuesday. I have a Lowepro bag that I think is going to be slightly too big (by 1.5") for the airline's 22"x14"x9" carry on requirement. I don't have time to order anything online. Is there a backpack at Best Buy that is suitable for a DSLR and some lenses that meet the carry on size requirement? I am wanting to take D800, 14-24mm, 24-70mm, and 50mm Prime. I'd also like to take my D3100 as a backup. I can put the battery chargers in the check in luggage. Please help.