Contact Little River Outfitters in Townsend TN which is by the southwest entrance to the park. Here is the link
http://www.littleriveroutfitters.com . If you want to catch fish the West Prong of the Little River and Roaring Fork creek are good for small rainbows. Roaring Fork is just inside the park and just outside Gatlinburg. The East Prong of the Little River will have spawning brown trout. This is the time of the year to catch the big browns. Many of the headwater streams will have native southern brook trout. Also the West Prong of the Little Pigeon River flows through Gatlinburg. It is stocked with rainbows once per week but, I’m not sure if they are still stocking in October.
Be forewarned that the park will be crowded this time of year with everyone being down for the fall colors.