I just watched Nat Geos White House 'Through the lens' Obama Administration doco and it blew me away!
His photographer Pete Souza carries a minimal of gear two bodies short and long zoom lenses flashes, maybe a backup short lens and I imagine loads of batteries and cards.
Has to hit ALL his shots, and NONE of them are deleted, they have to be unaltered by law. He has the same crazy schedule as Obama but doesn't travel in the same car so has to run in after him to get official greeting photos etc. Typical day is 13 hours but has a staff of 3 photographers and someone who manages the images. Thy output 20,000 - 80,000 shots per month.
So basically a wedding shoot every damn day!
Of course a huge part of it is the relationship between him and the subjects especially the President who are just oblivious to him as they are shot all the time. I knew they had photographers but didn't realise they shot so much behind doors as well as formal engagements.
Interesting stuff.