Ray
I just did 35# for a birthday party. If you have a vac sealer it is really simple - put the meat into the bags with some captain morgan and apple juice mixed with some of your rub and seal it up and referigerate it.
If you dont have a sealer you can double or triple bag it and referigerate it.
In either case - to reheat it, put the bags into water that is not quite boiling but very hot for about 30 minutes and you will have reheated it without recooking it which would dry it out.
Here is a link to what I did
http://www.smokingmeatforums.com/forum/thread/95326/pulled-pork-for-the-jedi-training-camp
Good luck with the party
Gary