Hey, I am looking at buying a Kelty Red Cloud 5600 pack. I need to use it as a suitcase to travel and then as a pack for hiking. The dimensions go over the maximum dimensions for luggage by 7 inches. I was wondering if anyone has had trouble checking packs in for flights that are this large. If anyone has had to pay a an extra fee or if it's possible to make the pack fit the required dimensions. I'm assuming that it goes over the dimensions if it's packed full. Any insight on this would be great before I decide to buy this pack.