Jeff, you might get a bigger bang for your buck in you go more direct to our specific group. I did a quick Google search for a canoe/kayak club directory and got this: http://www.canoekaya...paddling/clubs/. Although I haven't looked into it yet, I know Knoxville as well as Chattanooga, (and probable Nashville & Atlanta) have a strong club with scheduled outings and get together's all summer long. That would be the perfect audience. Guaranteed interest!!! I just depends on how much time and money you want to invest in this type of marketing, and how big to you want the business to get.
Oh yea, for classes, do you have a community college close by? Here in Knoxville, Pellissippi State offers just about any type of craft/hobby class you can imagine. Perfect facility, equipment, and insurance in one easy to swallow pill. Compare that with an ROI on a metal prefab building large enough on your property and the cost of insurance.
http://www.discoveret.org/chota/
http://kayaking.meetup.com/cities/us/tn/nashville/
http://www.tvccpaddles.com/index.php
http://www.birminghamcanoeclub.org/
http://www.atlantakayak.com/
http://www.georgiacanoe.org/