Anyone ever gone down and tried it out?

Was curious, we usually go up to Arkansas to get our trout fix but I heard it can be decent under dam at canyon lake.

Give these folks a call.
They can tell you where and what they are hitting in real time!
http://www.grueneoutfitters.com/

Devils Playground just below White Water Tubes is good all year around. Early morning bite is the best during this time of year. That part of the river is a "Trophy Zone"! Only one fish in possession and it must be 18" or longer. Also no live or dead bait. Artificial baits only.