I don't carry a backpack, skateboard, or a guitar, although I see nothing wrong with it. Is it unprofessional to skate on an overnight or have a hobby? If your worried about what passengers might think, then you should be sure to never visit the bar on your overnight, what might the passengers think? I think the guys that are complaining are the same guys that either don't talk at all enroute, or just b itch about everything the whole trip. Either way, I personally don't want to be anything like them. I'd rather try to find ways to enjoy myself on my trips and on my overnights.