I have not fished the Obed River, but have fished the Caney Fork a bunch, it's pretty cool. The water comes out of Center Hill Lake around 52 degrees year round and crystal clear, it is stocked with trout. You can get some big trout. The Caney Fork runs into the Cumberland River, which has huge Stripers. In the warmer months the Stripers will come up all the way to the dam. Trout swimbaits can really get the Stripers. I remember hooking a trout once and having a 40 lb Striper take it right at my yak. I also remeber fishing Center Hill and foul hooking a HUGE Drum on 8 lb test. I ended up holding my spool to snap my line as opposed to getting spooled.