I got my Disposal working again
Purchased an Allen wrench tool at Home Depot, specifically for garbage disposals, (none of mine I have, seemed to fit).
Anyway, inserted the wrench, gave it a little 'back and forth' movement first, which was tight feel, then felt it break free, then gave it several clockwise spins. There must have had some crud build-up in there, from non-use for several months, as this is my Southern winter home.
I think before I leave in the Spring to head back North back to Winnie, I'm going to pour some vegetable oil or maybe some Crisco in the drain and run the disposal, to let it lubricate the blades for the season.
Thanks to everyone, for their recommendations, much appreciated !