Assigned tables or Free Seating?

Dear Auntie Dana-
I hope that you can help solve this argument- My mom really thinks that we should do assigned seating for our guests but I feel like it goes against the relaxed vibe that we are trying to create for our wedding. . . can't we just let our guests decide where they want to sit?

Remember when you tried to find the perfect spot to sit in the middle school cafeteria...the angst?! Assigned seating takes care of that...the 'popular guests' don't all gather at one table..pulling up extra chairs from the surrounding tables...Auntie Dana isn't left sitting all alone; you have been kind enough to seat her with the wild baby boomers and she is happy with that!

Auntie Dana strongly recommends assigned seating.