Can I fly fish Grand Lake, Oklahoma?

We are going to a family reunion along Grand Lake, Oklahoma. I have been learning to fly fish on smaller stretches of rivers in Oregon. We are working on packing for our trip and I am wondering if it is worth my time / space to pack my fly fishing gear. I do not want to be the guy who shows up at a down-hill slope with his cross-country skis, so to speak. I know that the lake is filled with bass, catfish, and crappies.

Any help along these lines would be appreciated.