Jeff,
I fished below the park, up from Cardiac on Friday with a guide from OzarkTroutHunter. It was a bit slow but the trout are there. I will probably be hitting it up again here pretty soon if your up to go.
Your best bet according to the guide is early, but you would probably do pretty well in the evening as well. Remember you can fish anytime out side of the park. Not really sure about what to use with spinning gear but a rooster tail would surely put you on to a few rainbows. Did not catch many small mouth though.
Jason