We stayed there this past January. The boats don't run until about 7:00, and that is only the boat to the Contemporary. DH jumped the 7am boat and was able to run to the viewing area just in time to see me go by for the 1/2. That is about mile 4.5. For the Full, the Cont. is about mile 7 so you have a little more time.
On Sunday for the full I took the 7am boat to the Cont. and was able to see most of the WISHers come by, except for Christa who was running way fast.
After you view the Cont., you can jump on the Monorail and head over to the Grand Floridian.