I am going to have to agree with future dad in law here. Anytime I have gone to weddings and spend all that time and money only to get a salad bar or something I feel hangry and irked a bit. Yes it is your day and everything is about y'all, but at the same time, to me at least, its just common decency to fill the guests up for their time and efforts to come celebrate that day with you all as well. Just asked my wife and she agrees as well with my sentiments and your future father in laws. You can still offer little higher end dishes if you want, but have something else on the side for people that want to eat their fill and enjoy themselves. You definitely don't want a mass amount of hangry guests on your hands.