Tim Mulvihill
TVWBB Fan
Hi John, if you have $100 burning a hole in your pocket, check out the silver bullet jacket from BBQ guru site.
If not, before I purchased my bullet jacket, I did this:
Regular minion method
Put the cooker together
Take the access door off until the lid temp gets to about 325+ degrees (for bigger cooks like your 4 pork butts)
Get the meat in the smoker and close it up
The WSM should be in the 225-260 range unless you pulled the butts straight from the fridge
Prop open the access door slightly with a hammer/grill scraper/whatever as necessary if the temps dip
If not, before I purchased my bullet jacket, I did this:
Regular minion method
Put the cooker together
Take the access door off until the lid temp gets to about 325+ degrees (for bigger cooks like your 4 pork butts)
Get the meat in the smoker and close it up
The WSM should be in the 225-260 range unless you pulled the butts straight from the fridge
Prop open the access door slightly with a hammer/grill scraper/whatever as necessary if the temps dip