I started out using the oven crutch all the time. I was only smoking one butt at a time, and a friend told me about smoking a butt for 4-5 hrs. on the smoker after dinner, then wrapping and put into a half pan in a 225° oven so you can sleep. Works like a champ and I still do this when it is cold outside or if I just want to replenish my stock of pulled pork in the freezer.
Using a half pan covered with foil prevents the pork fat leaking into the oven issue too.
Traeger Lil' Tex Elite, WSM, Green SS Performer, 22" OTG, hyperfast orange Thermapen. CBJ.