http://www.orn.usace.army.mil/op/cen/re ... y_Fork.pdf
I didn't catch that you're new to the sport. Here's some unsolicited advice:
Don't get discouraged. The really cool thing is that you never stop learning, but the really hard thing is that the learning curve is pretty steep. Lessons before stepping in the water is by far the best way to learn. Learning knots and how to throw a line without wind knots/hooking yourself/constantly hanging a limb/etc. will get you on the water and go a long way toward keeping the frustration down. Like golf (I hear), bad habits are hard to break.
Lessons will catch you roughly 10X the number of fish that expensive gear will catch.
There is good gear and there is expensive gear. Buy good gear, not expensive gear. Used is best. Lots and lots of stuff on ebay, most being sold by people who wanted to fish but didn't pay for knot and casting lessons first.
Bluegill are just as much fun to catch on a fly as trout. They just don't live in places that are as pretty. (But they do live in places as pretty as the Caney Fork.)
Fishing with a guide is only a fair way to learn knots and casting. You will catch a few fish. You probably won't learn much. It could be a good way to decide if you want to invest in "the stuff", since most will provide rods, flies etc. If you hire a guide get it straight up front: you want to stand in the water and fish, not spend all day in a drift boat. Unless you plan to buy a drift boat along with all the other "stuff". If you plan to buy a drift boat with your other stuff before you take lessons, call me before you put that boat on ebay.
The Caney is a good place to fish for trout sometimes. I grew up fishing the Caney. You will hear the term "Big Ditch" thrown around. It isn't real pretty. The water goes up and down because they pump water (lots and lots of water) through the Center Hill generators. Sometimes they have problems with the oxygen levels in the water. Sometimes the water warms up pretty quick if they're not generating enough and that stresses the fish and puts them off. That's probably the reason for the "wait until Oct. or Nov." you heard from Jim. Timing is pretty important on the Caney and you'll need to do some homework before you drive all the way up there. Big Tip: if the water starts rising, get the heck off the river, and do that on the side where you're parked.
I don't mean to discourage you at all. I love to fish. I use it as an excuse to spend weeks at a time fishing small streams out west. Nothing is more fun, once you get some of the basics down. I started fly fishing over 40 years ago. I flailed around for years until I had somebody show me how to tie knots and how to cast more than 20 feet without making a mess.
I hope you try it and I hope you love it. Good luck with it!