I think I'd like to do the fall run on Block too.
In the mornings, you can literally watch the migration from those houses on Southwest Point, you can see the schools with birds in tow, coming down from the north towards the Southwest Buoy. I've seen two and three big, distinct groups of fish with a mile or two between them - its way cool.
Plus this dream is reachable - I think its important to keep your dreams within the realm of possibility.