I am a firm believer in "Its your special day, you do whatever you want!" But I wanted to caution you on two points:

1) If you have an ultra-formal wedding etiquette states that you should have 1 groomsman or usher (whoever is escorting people to seats) for every 50 guests.

2) As a guest if you have an enormous wedding party, either too many to fit the front of the church or more than the guest list, it can be overwhelming for the guests.

Ultimately its your day and you should do what you think is right and best. My DJ said when we met with him the first time "Its your day and you can't mess up because of that."