Mornin',Qdogg.
If you have a Foodsaver,bag them and drop in hot water as you need them.
If you don't have access to one,I'd wrap packs of 6 in plastic wrap and double foil them.
Preheat your house oven to 225� and place the bundles in about an hour before you need them.
You are just trying to bring them back to 140� and when you get there,you can reduce the oven temp. to 140� and hold 'till you are ready.
You can take them out as you need each package that way.
If you still don't have enough room,you can always load a bunch in the CS and let it hold them at 140�.
If you need to hold or move them all together,wrap a towel around the packs for extra insulation and cooler the whole bunch.
Their combined heat should hold them a couple of hours.
Hope this helps some, until one of the caterers or vendors chimes in.