I actually do this quite a bit. I do use butcher paper to wrap during the smoke and will leave it on in the case below.
After the initial smoke, internal to 203F, remove and put brisket, still wrapped, into a jumbo plastic ziplock. Leave the ziplock open and surround the brisket in ice in a cooler. Once internal temp gets below about 120F, zip the bag and cover in ice or put in the fridge.
(At this point, I have also put in the freezer and pulled it out/reheated as much as 4 weeks later).
The morning of your event, take out of fridge (or the night before if frozen) and place thawed/room temp brisket in butcher paper with about 1/4 cup drippings (saved from the smoke, or water if you don't have them). I'll also say that after you pull out of fridge or have thawed to room temp, it reheats quicker and with minimal, but some, loss of liquid. Frankly, it won't lose as much as you think if you follow the below. I usually will cut mine into 1 lb chunks - flat and point separate.
Put on pit and heat, off the direct fire, until internal reaches 140F.
Serve and most will never know you weren't up all night watching the smoker!