The last time I was there, a guy was catching rainbows from shore...casting a spinner of one of the long rocky points. He was doing well early in the morning, and I would venture to say it was not this late in the summer....we did go swimming, so I would say it was probably June.
Other than that, DEFinitely take a look at google maps and see if you can't spec out any drive-to lakes...tons of good fishing in the general area.