I agree that the best way to do this is to vacuum seal portions that you can reheat with hot water later. I do this every year for our Cub Scout Pack at our annual camping trip. It'll be just like it came off the smoker and was just pulled.
If you don't have a vacuum sealer, I'd put the PP in a pan and SLOWLY reheat it. I'd put some apple juice in with the meat to keep it hydrated during reheating. Stir it often to prevent the bottom getting too hot.
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