If you can make it further than 80 miles, you will only need ONE tank of gas. This can will be at lunch.
If you can't make it furthur than 80 miles on a tank of gas you will need to bring TWO cans of gas. The entire ride will be about 10 miles from 91 octane gasoline. Plan accordingly.
For those with TWO gas cans the stops with be as follows.
The first will be approximately 40 miles from the start waiting for you. This gas can will moved to a stop approximately 40 miles after lunch. This can will fill your bike TWO times.
The second will be waiting for you at lunch. This can will be brought back to the fairgrounds after lunch.
If you are prepared, you will have a stop for gas every 40 miles of the ride.