Who walks who down the aisle?

We're having a traditional catholic ceremony. My dad is walking me down the aisle. My FI wants to walk his mom down the aisle.

How do we execute this? How do the other GM and FI's dad get down the aisle? My brother is a GM and I'd like him to walk my mom down the aisle and then my dad can walk me down. How does this all work?

We are having 1 MOH, 1 Best Man, and 6 BM and 7 GM. My dad is walking me. FI's parents are married. So... any ideas? I don't really care of the girls walk solo or paired up. It's a looooong aisle (St. Rose of Lima), so maybe paired up would be better?

What about this idea?

DF walks both his parents down, doubles back to rear of church. My brother walks my mom down, then doubles back to the rear of the church.
DF and the two priests (family friend and 'house' priest) walk down the aisle, signaling ceremony is about to start.

We pair off GM/BM and my GM brother can walk my BM sister who will just have had a baby down the aisle (she'll feel more comfortable with him). One BM can have 2 GM with her.

Too uneven? Do I care?

this is what we are doing.

FH & the best man will be at the alter with the priest.

FH has choosen the GM he has been friends with longest to walk FMIL down the aisle first. (FHs dad has passed away)

Then my brother is walking my mom down the aisle.

then the BMs & GM will be walking down the aisle in pairs.

next will be ring boy

followed by flowers girls & directly behind them is my SIL. (shes a bridesmaids too but i want her with my nieces in case ther get nervous)

then my MOH

lastly my dad & I.