What is it to be used for? If you are carving it, are you serving it sort of pulled? Sliced? Sandwiches?
Watch those bones. It is very difficult when doing that much food to catch everything when you are pulling the meat.
Actually carved is probably the wrong word, cut would be more appropriate. I'm planning on cutting it up into wings, drumsticks, thighs, and the breast in 2 or 3 pieces depending on size.
It is a free community meal, so hopefully people will get their money's worth at the very least! Other people are making side dishes, salads and desserts. There will also be several people willing to help, so it's not all me (unless they need someone to blame)!
Thanks for your vote of confidence!
I would be somewhat skeptical of the skin in your process if you are serving as whole cuts. I have served tons of chicken pieces out of coolers after cooking, which is essentially the same thing you are doing. The chicken kind of steams itself packed in the coolers, but stays hot forever. The trade-off is the skin. It's not ideal to me, but the masses never seem to care.
If it were me doing it, I would go get a test chicken. Cook it as you are planning to. Re-heat, and let it sit in the foil pan for approximately the amount of time of the service day. See where you are at quality wise, and adjust if needed. Whenever I do larger cooks, I try as much as I can to duplicate the conditions the meat will be in during the event well prior to the event. It never goes exactly as you think it will, but this gives you a baseline for expectations.
If it's amazing during your test, it's probably going to be somewhere in the very good range when super-sized to 100 people. If it's simply average during your test, its most likely headed for below average when multiplied. It gives you something to work off of for the big day.
Good luck.