Mid-March in NC the spawn will be in full swing as it is starting now. You could save a few hours off your trip and hit central NC, then have the option of several lakes in the area. All of them have big fish. Mid march I think you could well exceed 6+. I think for @Pat Brown in mid march that's an average catch. For me, it's an awesome catch
All of our lakes pretty much are good, but if you want a big I'd avoid the spotted bass fisheries like Norman, Hyco, etc. as you can catch numbers but they are small. They do have some big fish in them, but imo they are harder to locate because the ratio is lower.
Look at Jordan, Falls, Michie, Butner, Mackintosh, High Rock, Tuckertown, Badin, any of the city lakes like oak hollow, Brandt, Higgins, Graham-Mebane, etc. Many many choices, and I'd bet all of those have a double digit in there somewhere. I wouldn't bet on you catching one, but the possibility is worth pursuing! I'm happy to provide further thoughts if interested but don't want to hijack the thread acting like a travel agent for NC 😎