I think it depends on how much time you have on your hands. You could probably just get away with signs in front of each dish. But if you're feeling extra crafty you can go for 1 menu at each table
Hello there! Congrats and welcome to the forum. There is so much information here...you should be able to get the answer to hopefully all your questions!
This might sound strange but I read somewhere that a warm glass of milk can help too. Milk contains tryptophan. It's the same amino acid that turkey contains that makes you feel sleepy after a big Thanksgiving dinner.
I agree with FutureMrsSharpe and maybe your FI should talk to them alone to see what they think. I think if it were my situation my parents would have been flattered that we could share something special on the same day.