For 9 hours (if traveling right after it is done), I would take it in a faux cambro and leave it warm. You may need to reheat a little, but it should stay warm enough to be safe if you pack the cooler well with towels and wrap it tight in foil. Any longer than that, I would refrigerate and then travel with it on ice. Always keep it unsliced, and reheat whole (at around 200 does best IMO) if necessary. If by some chance it is already frozen, I would travel with it on ice after thawing as much as possible in the fridge. If carrying it on ice and needing to reheat, I would vacuum seal it if possible.