Phil,
One generator is just over 3000 cfs
I probably wouldn't get on the Elk in a long boat with less than one generator. Less than one exposes shoals, the gravel bars and most of the stumps, etc...
One generator running could be a real problem. As you know the Elk is a little tight with the turns, downed tree (at Van Zant) and the stumps again could come into play, but in a different way.
If you have a canoe, kayak or something like that, it might be better on less than one.
Just a few things to consider.