Not sure why you couldn't claim check your backpacks as described on the Rockies website. Softside bags are a permitted item but probably too large, so would be in the restricted category. Still, they have the claim check tent for those items. Food seems to be a permitted item, except that any fruit or veggie larger than a grapefruit must be sliced.
Centrally located between Downtown Denver and the D.T.C., Colorado Center was designed to be the central location for everything in your life. From a high-quality office environment to great restaurant and entertainment options, Colorado Center is a premier transit oriented development with three existing Class A Office Buildings. Tower III will complete the office component of the project, along with future Residential and additional Retail.