I like the "rubbers" idea. A few disclaimers: Yep, I ride to the trail cuzz the cops don't seem to appreciate bikes on I-4; The distance from car to trail can be as much as 150 yards. Ever try to ride 23's thru sweet sand? Also, the rims would be cruddy.
Another reason for the shoes I forgot to mention (and this kills the rubbers) the trail is point-to-point, with only one pick-up over the 32 miles. I for sure don't want to walk out - should the worst occur - wearing cleats.
I think the zip bag has some possibilities, except there is no rack. Thanks for the ideas.