I just discovered this very detailed and informative guide to all of Florida's official Designated Paddling Trails. There are links, maps, guides, and photos of every trail.
floridadep.gov

Of course, in Florida there are also a gazillion miles of river, spring, swamp, lake, estuary, and ocean paddling opportunities in addition to these DEP designated trails. No portages, no black flies, no frostbite, no clothes necessary (?!), no bears, no off season, no state income tax.
Florida's Designated Paddling Trails | Florida Department of Environmental Protection
Spring-fed rivers, county blueway systems and the 1,515-mile Florida Circumnavigational Saltwater Paddling Trail provide exceptional paddling experiences rich in wildlife and scenic beauty.

Of course, in Florida there are also a gazillion miles of river, spring, swamp, lake, estuary, and ocean paddling opportunities in addition to these DEP designated trails. No portages, no black flies, no frostbite, no clothes necessary (?!), no bears, no off season, no state income tax.