Here's what I did once..
Smoked the butt on Saturday, pulled it Saturday night after it rested a few hours in the cooler, still quite hot. Bagged in ziplocs and kept in fridge till Monday morning. Got to work at 7:00 AM, put it in my crock pot, poured a can of chicken broth in, stirred really good and heated on low until lunch. Perfect eating temp, everyone was begging for more. It was incredibly moist, but didn't soak the buns (made sandwiches).
Hope this helps.