I'm flying US Airways next month. From home, I plan on checking in online and pay the $15 luggage fee. They said it was $10 more to pay the luggage fee if you checkin at the airport. The problem will be on my return flight home. I won't have a computer while on vacation. I'm staying at GF. If I go to the front desk the night before my return flight, will I be able to have them do the online check-in, print my boarding passes and pay for my luggage fees using my CC or is there a better way?