How big a brisket? I would cook it off as usual, let rest in foil, slice, vac seal it, store it and then when you are ready to take it to the office, put it a cooler with boiling water poured on top, add a bunch of ears of sweet corn and let them swim around with the Brisket packages. Tailgate in a cooler.
take a look at this http://www.bonappetit.com/blogsandfo...oler-corn.html
Backyard Disasters are my specialty.
"Tushka" The Black Warrior 24 x 50 offset by TuscaloosaQ, "Libby the Lion" L5000 gasser, and "Vanessa" my Vision Kamado Pro III & "Ruprecht" my Weber Gold OTG
Member KCBS, FBA
Pitmaster at "Sultans of Sting" BBQ Team it's a French thing!