I carry mine on. I have to get everything for a 5 day backcountry hunt on the plane. 1 rifle case, 1 large checked bag (<50lbs) and my carry on. I use the backpack as a carry on. I only have my boots, binos, rangefinder and a few other important items in it. As long as the straps are all tied up it's not a problem. I have done this with both an Eberlestock J?? and now a Seek Outside pack (Unaweep). I also carry on a small computer bag with a book to read, my iPad mini, a pen, earphones, PowerBar, etc.
