Wrap your belt around the outside of your bag. This works especially well with a duffel, but turns out with a backpack too.
I use a best belt at home no issues. I spend a good bit of time on the road with work. I do have some opportunities to lift, especially on longer trips. That being said I typically travel with a carry on and a back pack; due to the job I don't check bags. That being said, I wish I had a belt with me but the best belt is to bulky and heavy to pack (need 5-7 days of clothes). I realize getting something thinner and lighter won't be the same; but I currently have nothing on the road. Any recommendations to look at?
Wrap your belt around the outside of your bag. This works especially well with a duffel, but turns out with a backpack too.