The Keys are what inspired me to plan this trip in the first place. But as I read more I saw a lot of mixed reviews on the bike trail complaining about traffic noise from the road adjacent to the trail If I road the Keys I would like to do it one way the way you did. The ferry sounds fun, but Ft Myers looks like a dead end for me given my schedule.
I was planning to use one of my 3 days in Miami to do a bus tour of the Keys. It looks like there are a lot of options and maybe multiple options that would let me take my bike with me.