Hi, im new here. My fiancee and I are going to be hiking in Yellowstone this july and we dont want check any bags in the airport because we are traveling from Puerto Rico and we will make a few stops, last month I traveled to NYC non stop and the airline sent my bag on a diferent flight and I dont want that to happen here. So thats why im looking for a hiking backpack that I can take in the plane with me as a carry on, also I want to take it with me while I hike yellowstone so it would be great if it had the rain cover just in case. The carry on size limit on most airlines is 22" x 14" x 9" or 56 x 35 x 23 cm