Though you can cruise at 20 knots, I would not blow by this great section of coast line. Loads of options between CW and KW...Egmont Key, Manatee River, Longboat Key...Venice (Crows Nest is awesome!), Naples, Pine Island Sound (Useppa, Cabbage Key, Sanibel...), Marco Isalnd, Everglades/Ten Thousand Islands....and that's just the short list.
Claiborne Young wrote a very good cruising guide for SW Florida
. I assume its still available.
N Cut into KW is long and well marked/charted.