I hate to make this suggestion, I would not cook inside a structure. I would start the cook outside on thw wsm and when your meat gets to 150 and its has taken in all the smoke I would finish it off in the oven. Its a more controlled environment and wrap in hd al to finish it quicker if your running out of time. I would recommend starting Saturday night. With the rain the temps qont get away from you. Pulled pork can be reheated and no one will know.
Started it at 1145 and took it off at 1145 today then foiled it and wrapped it in towel and it stayed steaming hot til dinner at 6 tonight was the most delicious pulled pork I've ever had it was perfect and I'm definitely not foiling any more on pork butts these last two are way better unfoiled the wsm performed flawlessly as usual never moved more than 10 degrees in a 12 hour period I didn't have to add anything at all was very impressed