Rendered fat does not soak through the meat.
The last butts I did I trimmed off nearly all of the fat cap, so it didn't really matter. They came out awesome; more bark and less waste while shredding.
Ok two more question for the pros! What temperature should I maintain in the Kettle and what temperature should the butt be inside when I remove it?
I'm in the group of no trim and fat-cap down. My reasoning is I shoot for 300 deg for butts and picnics and the FC shields the meat and slowly renders away leaving the false cap.
I've done a few FC up and I feel as the fat renders and bastes or lubes the butt as it slides down it also washes off some of the rub.
As far as internals I don't temp butts anymore. I go by time at a certain temp and when I like the color and the butt feels pliable to the hand I'll start probing for tender.
Tim
Eat like a pig.