He will work on the plane coming and going. While there he will take a walk or get a boost from the crowd - maybe an hour and a half. Then back on the plane to work in a quiet atmosphere where he will not be disturbed.
A lot of people aren’t going to be interested in the conservation during the debate. We’ll all be focused on trying to see if Hillary is reading from a hidden teleprompter, pushing a button, making gestures to the mediator, if there’s a folder on her podium, if she looks or acts sick, does she look like she’s ready to have a coughing fit or seizure, gosh the list goes on.