It's so funny about the issue of the stickers. I left mine on until it finally rubbed off, so one more vote that some folks leave the stickers/LCD cover on.
The alternative is a scratch on a the LCD, which I would rather not have.
There are plenty of aftermarket covers, but the Phase One cover that ships on the screen actually does a good job for about 6 months or so. Putting on a new on is always a pain as it never fails that one piece of dust will get between the cover and LCD, just where you don't want it.
As to the number of lenses and camera gear being carried around, lots of gear, but I am sure he has lots of assistants to help move it around.
As of the QC sticker, I still have mine on. Never got around to pulling it off.
Paul C