First - speaking from personal experience. If he went on a summit and ONLY took 500 people it would be a freakin' miracle. The Clinton G7 trip to Naples in 1994 had over 900. Planes? You'll never believe...
Air Force One - primary
Air Force One - backup
Marine one - three
C-5 for Comm Team and up to 100,000 lbs of gear
C-5 for Secret Service vehicles, limo's and armor car
C-5 for transporting Marine One helicopters (they can't self deploy)
a small jet for emergency relocation
Fighters for CAP
in-flight refuelers for the heavy to get them where they need to go
there's more... get the picture???
NGH