Yep, they can sit in a warmed cooler, cambro, even a 180F oven for hours, then you pull and serve when you want. Four hours is no issue at all, keep them wrapped though.
"perhaps...but then again...maybe not..."
careful there son, those ribs are boiling hot...
(='.'=) Here there be bunnies...
Pacific Rim BBQ
Bob's Brew and Que