Can you take a large camera into the stadium

SMALL STILL CAMERAS UNDER 6" WITHOUT CASE

No

I believe there are guidelines on their website.

They say no cameras with detachable lenses.

Can you clarify what you consider 'a large' camera? There's no issue with bringing photography equipment into the stadium, however, the space you have available to you once in your seat is pretty limited so if you're talking a large camera in the sense of one with a big telescopic lense or something, I think that you would find it to be very inconvenient. Additionally I don't believe that the fans sitting in either seat next to you would be particularly pleased with you either. Hope that helps!

Yes in a clear bag

They do allow still cameras. As long as you are not making videos you are allowed to bring your camera in.

Under six inches only

yes

I don't know but you can check the Chiefs website.