Your plan sounds risky with no contingency if something happens...you have 20 hungry guys to feed, who have guns...
For me I would cook one more butt...Cook them early and pull...get them just right, then pack and chill them...keeping them cool is easier then trying to control the rest/hold process...youll have peace of mind to focus on the dove...
Then reheat prior to dinner...this will also free up your time to talk stories about your hunt...My .02
"Before the end of this thread, someone will tell you to build a UDS"...Nostradamus
Lang 36 Patio - Kamado BigJoe
30" Gasser(Dock Box)