Well, now you have plenty of time to concentrate on chicken and ribs to hit those times closer. The one hour gap in turn-in times is generous. The 30-minute ones can seem like 15 minutes sometimes.
Pork is a little more forgiving than brisket. Depending on how hot the wrapped meats were when going into the cooler, you might find it necessary to vent the cooler by cracking the lid a couple of times during the hot hold time. You don't want excess condensation, or worse... having the meats cook further.