Fall cocktail casual. Not black tie, not jeans and a t-shirt.
Listen, we would really like to make this a predominantly child free wedding. Yes, there are kids in the wedding party, they don't count. (Though feel free to pawn them off after Grant and Nick.) Kids do count for our catering head count, and they generally put a damper on you parents cutting loose and having fun. So, for tonight, please try to leave them out. Plus, like 3/4th of the time they're lame anyways.
This will be 85% outside, we have a tent in the event of any inclement weather. Please plan footwear accordingly.