More info please. Assuming ...
~ you have a WSM
~ you have to work Thu, Fri, Sat
~ you can't take Fri afternoon off
~ you need it off by 8:30am so you can take it with you and serve it for lunch
~ no help at home
~ no oven at work
Hmmmm ...
I'd go higher heat, about 275º~300º, starting about 8am on FRI targeting about 8pm finish time. This will give you a buffer in case it finishes early or late.
Let it rest an hour, pull it, pan it, sauce it with a thin finishing sauce, cover with foil, and refrigerate.
SAT morning, warm in a 250º oven about an hour to at least 165º. Then double-foil it, wrap in hot towels, then into a cooler lined with newspaper.
Oh, and Welcome!