This from Centurylink Field Website:
EVENT TIMELINE FOR MAY 14, 2017
10 AM | Northwest (NW) Stadium Box Office Opens Visit for Will Call, Ticket Sales, or Customer Service Inquiries
3 PM | CenturyLink Field Event Center Box Office Opens Visit for Customer Service Inquiries only
9 AM | CenturyLink Field Event Center Parking Garage Opens (parking $50) Tailgating is not permitted
5 PM | Premium and Stadium Gates Open Early lineup is not permitted
6:30 PM | Show Begins
11 PM | Show Ends (expected end time)
Most Stadiums have adopted these policies
Bags that are clear plastic, vinyl or PVC and do not exceed 12″ x 6″ x 12″.
One-gallon clear plastic freezer bags (Ziploc bag or similar).
Small clutch bags, that do not exceed 4.5″ x 6.5″, with or without a handle or strap, may be carried into the stadium along with one of the clear bag options.
Don't quite understand: parking lot opens at 9am, no tailgating, no line up...