Try to play it off like it's an iPod Touch. Or get a case that will cover up that camera.
You failed to read the previous posts?
These security guys are NOT your local retired octogenarians...
No recording/Camera equipment means just that, they will make you take the phone out of the case and verify that there is no camera.
THe best bet is;
1. Get a back cover that covers the camera and HOPE they allow this. The ability is there and what is to say you wont slip the case off?
2. Carry around a throw away PAYG phone with no camera and just swap sims. I've had to do this for 7 years no issues. Some sites have a 'Secure storage' area where people can put their phones/pocket knives/usb devices while on site so leaving it in the car isn't an issue some times.
3. Pay to have the camera removed? I can see a market for camera upgrades via this route too.