Dang...first there was the "12 hour question", now a "10 hour question"?
Honestly, if it were me and the thing JUST came out of the cooker and I was immediately wrapping and putting in a warm cooler with other things to help keep it warm, I might just try and see if I can make it 10 hours. However, since you already split it making it cool down quite a bit, you have no choice bu to let it cool and reheat later.
Then again...you probably already made up your mind by now.
Hope it goes great for you!