business trips and tri training

I used to sign up for centuries and other long course cycle trips but my business trips would always get in the way and I only ever completed one. I got out of the industry for about a year, which is how I started my tri training. I'm back in the industry (convention management) so I am on the road a lot and my trips are exhausting. Here is an example. I have a Sprint on Sept 17th. I will be away on business from the 11th to the 16th. The days of the 12th thru the 15th I will, literally, be at work at 6:30am and I will be on show floor, running around, fighting fires until approximately midnight. I simply can not get up at 4:30am to get a workout in and make it to work at 6:30 when I won't get to my room until about midnight. I had a similar schedule last week hence virtually no workouts done.

How do we do it??? Anyone have any at your desk or short workouts you do when you can only grab 15-20 minutes???