Yes, cooking at 325 for a shorter period is always an option. I could just get up early, smoke the food and still be ready in time for the 12:00 opening ceremony.
The question is really more about stacking/fitting them in the oven, not so much how long or at what temp to cook them. I've never done the oven thing, let alone with this much meat.
Just a guy who smells like a campfire and his WSM