I would pop up a map of Walton Co, find the rivers that are boat accessible. Go out during the day see if you can see any gators sunning themselves. Also try during the night. Other day over in SR co I was out and saw a 6 ft gator laying on a log, about another half mile up river a 4 footer I know 6 and 4 isn't big but it meant there are gators out during the day.
IF you know that part of the river at all I would sugguest Fish Lake, Log Lake and Magnolia Run. I put some guys on a big Gator in those areas and they couldnt close the deal. If you need some directions just PM me..