Fortunately, I live in the "hilly" part of FL (Tallahassee) any the
elevation of my home is 215'.
The Wacissa/Aucilla rivers are true wilderness jewels with very little
traffic. The Wacissa is spring fed and when you are on it you feel as
if you are in some South American jungle with so much life it si
astounding. Crystal clear spring runs come in from the sides. The
springs are ideal for snorkeling. The Aucilla is an odd tannin stained
river that flows fast for a FL river and even has two sets of "rapids".
Its canoeable portion is the upper aprt as it suddenly goes
underground comes back up flows for a hundred feet and goes underground
again repeating this process many times. Hiking this Aucilla Sinks
part is really interesting (winter only due to bugs, snakes and high
water).