We have the rest of our bags purchased. My autistic teenager would rather have a backpack than a roll-away (which actually works better for us with space issues, too.) My husband and I both have 26" bags to check (direct flight), and we could put some of his stuff in our bags if we needed to. (The adult bags are the biggest- our three girls all have much smaller bags.)
I am looking at a High Sierra backpack that fits 2079 cu inches (and appears to be under the size for Lufthansa.) Will this be big enough for a few days outfits and various other things? Should I look at bulkier options? The Rick Steves type of backpacks seem a little bit big and not cool for a teenager. ; )