I cook and slice my briskets, then vacuum seal the leftovers. Reheat in simmering water. Its as good as the day it was made, except the bark is a bit softer. I guess you could "set the bark: again on a smoker...
WSM, Weber Genesis Silver-B
Weber Q Portable
1956 Weber 22 1/2" Bar-B-Que Kettle
and a Super Fast R E D Thermopen!!!