John, thanks!
I intend to leave some doors and the generator hatch open(yes, I'll build the generator too), and will probably install working lights(LED's) in the box. That would make enough of the interior visible, I think.
With regard to Campaign Gallery- it is created by Campaign Administrator, so you should ask Richard.
Awarding ribbons takes place after the Campaign is over.
There is a special button in Campaign Rule and Regulations Page, that's called Award Ribbons.It is is only present for the Campaign Leader(you), others don't see it.
When you press the Award Ribbons button, you'll see a list of all participant, with an empty box to the right of each name. If you click on the box, a tick will appear.
At the bottom of the list there is an Award Ribbons button.Once you mark all participant, that finished their entries and press this button, each participant will receive his ribbon.
Prove for succesfull participation are pictures uploaded to Campaign Gallery.
HTH