Check the Denision Dam thread under the bank fishing forum. I have only been there a few times and only once to fish, but was in my kayak. Lots of people on the bank with very long rods casting large topwater plugs or big plastic shad into the current.
If you go in the early morning, assuming the floodgates are closed and they are not generating the flow is very very low and you can walk up and down the bank quite a bit. The area is very rocky, so expect to lose lots of tackle.
You will need a texoma liscense to fish the TX bank below the DAM, but you are not allowed to wade into the water with that license.