Its a big lake. How big of a boat do you have? Little boat may be a problem.
I would think the upper ends in the skinny stuff would be ok for fishing, or the river below. Boat ramps tend to get crowded fast there from what I have seen.
I was there for a weekend for a few years ago, and found that there is not alot of online info around. But it is always worth the trip to explore.
My rule of thumb, if its a holiday weekend, find something secluded and hide from the ones that only do it on a holiday any more.