It turns out that the flights I booked for my upcoming hike do not include a free checked bag as I was led to believe. So I'm thinking of shipping ahead items that I cannot carry onto the plane along with starting food and to carry the pack (ULA Circuit) onto my flight. I think that the pack will appear compact enough to be allowed on board but I'm worried that TSA will object to the metal stay. Does anyone know whether metal stays within a pack are problematic for TSA? I'd like to avoid any trouble at the airport or having to check my pack at the last minute.