What river are you wanting to fish? I spend alot of time with my 5 year old boy on the clinch. The white bass make a good run in the spring and you can get into alot of them. We also enjoy trout fishing, they are easy year round. Skipjacks are another fish we like to target. They are easy to catch and loads of fun on light tackle. There is so much to do around knoxville its hard to say whats the best place to go.