If you want to wakeboard, stay away from Lake of the Ozarks. Branson isn't somewhere I'd want to go, but Table Rock Lake is. We went almost every year, and went into Branson maybe twice the whole time growing up - when it was raining. Table Rock is a big, warm, clear lake that is surrounded by rock cliffs. You can usually find calm water.
If you want epic riding conditions, go to Bull Shoals Lake. It's an hour or two farther from you, but is like Table Rock, only with a quarter of the people (not that Table Rock is that bad). With all of it's coves, you can find glass water almost any day regardless of wind. The only bad part of the lake is since it's so unpopulated, the accomodations are a little limited.
Also, if it's just you 2, factor in the spotter law on your decision. MO only requires a mirror. They do have the stupid orange flag rule whenever someone is in the water.