I've got a Chiefs party with the same timing. I roll out at 7am to serve at 10:30am.
I have found it best to clean and sanitize a cooler large enough to hold all the butts. I set up for a 12 hour cook on my FEC-100 at 270 degrees. I load the butts into a cold smoker set for 270 cook temp and hit play at 7pm.
Next morning I pull the full racks of butts from the smoker and dump into the cooler. They practically pull themselves and will stay too hot to touch for 8+hours.
I hit them quick in the cooler with a Roman Pork Puller on my drill. Serve only what's needed as it's needed.
Then just sit back to listen to the compliments!
I've got a stack of Cambros. Love them for ribs, brisket, beans and cold salads! I have found nothing better than a standard cooler for the pulled pork!
Best of luck.