Keeping pulled pork warm for a community event?

I smoke meats quite a bit and have been asked to provide pulled pork for a community event. I've never done more than 2 pork butts at a time, and now I'm going to be doing 6 and need it to last for several hours over 2 days. So I'm not sure how to keep the pork good during that time. Should I leave them in the smoker, wrapped, on low? Keep them wrapped in a cooler and pull them as I need? Just not sure, thanks!