Grayton Beach, FL

Will be staying in Grayton Beach State park third week of March this year.
Was wondering about the bicycling in the area. Though we have a tandem, we
will probably bring our "half-bikes" for the trips, since they are better
fit for leisure tours and the ability to go for trips alone. We will be
bringing both a trail-a-bike and trailer for the 4yo. We haven't put any
mileage in with him on the trail-a-bike yet, so want to leave our options
open. While the bicycling looks good in the area from what I have read,
just wondering if there are any "must do" trips or any precautions of
which we should be aware. Looking for information on trips of 20-30 miles
round.

Gregg