When mine come up to temp (195-205 for pulling), I remove from foil, and drop the shoulder with drippings in a roasting bag. Seal tight and put the foil back on. Wrap in a towel and drop in a cooler for 1-4 hours.
The roasting bag seals the juices in and let that thing steam itself into oblivion. You will have soft bark (otherwise known as "no bark") but in my opinion, is well worth it.