We have decided to do the same as you John as we are in the same situation and probably same area of NC. We have never closed in the 9 years we have had a pool.
I plan to add water in short intervals to keep it from getting too low, but will not be able to keep it high enough run the pump unless we get significant rain.

I flew out of Raleigh last week end, over Jordan Lake.... WOW! we have a big problem in NC right now!