Yeah, most of the yacht clubs and cruising groups in that area aren't into slow cruising except for their sailboat groups. I certainly didn't see many slow boats at the Marco Island Yacht Club.
You may want to see if you can hook up with these guys. They do some slow cruising.
You may just have to meet a group at the destination. It's too good of cruising down there to miss it.
We've had some Sabre group cruises there with a mixture of fast and slow boats. We would just meet at the destination. No problem.