You can rent boats at kennycott state park along with alot of other places. They have yak rentals and long cannals with plenty of fishing. You can look at the forida sportmen forum for more info on bridge fishing. They have several great head boats down there some go out for three days at a time to the dry tortugus. My plans have changed and had to get my two month depoist back for marathon this winter but wish I was there.
charlie
ps keys are always fun in the winter