Depending on your port of entry into the USA (assuming that you are starting from the USA), I would suggest the Atlantic Intracoastal Waterway (AICW) to Florida with significant attention to tidal flows between inlets from the Atlantic as the currents in the AICW can be significant in both directions depending on your location and the tidal phase.
Having a rather large yellow streak down my back, I would plan to hug the coastline during my entire trip, despite the increased distance, for the safety and support that one could expect there. Best of Luck on your adventure! George
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