WIBU to not go to this wedding?

[RubyWho]

DH's childhood friend is getting married in the summer. Couple have been engaged for about three years, and have been planning the wedding for ages, and have spoken to us about it in detail, including mentioning our DC.
Invitation arrives, turns out it's a child-free day. The elder of our DC is fine to be looked after by GP for the weekend of the wedding, but youngest DC is a baby and breastfed. We emailed the couple explaining this (although they obviously know about the whole baby/bf thing) and they fwd the email onto friend's FMIL. She, in turn, emails me and explains its strictly no children for the ceremony, and everyone they have invited with babies is either not attending or has arranged childcare. She says I am welcome to come to the reception with Baby, but not the ceremony.
Meanwhile, DH is asked to be an usher. He will be in the ceremony, and on the top table. I won't be on TT, because "of the baby".
So, i won't see Dh at all on the day, am being made to feel awkward because of the baby, and won't know anyone else there.
DH really wants me to go.
AIBU to just not go?

YANBU. I never was able to pump with either of my DCs, and it took a long time before they accepted any form of bottle. There was no way I could leave them overnight for the first few months.

Just a thought, perhaps the FMIL wants the OP to attend (without the baby) in case it reflects badly on her if OP's DH has to explain that as the baby wasn't welcome his DW couldn't attend (ie, appearances).

Sounds very likely, DartsAgain. And frankly, I do not think much of DH's friend and fiancee, hiding behind the FMIL doing their dirty work.

Why on earth was the email sent on to the FMIL? Are the bride and groom unable to communicate with their guests?

I don't like child free weddings particularly, not because I want to take my dc's but because it always means people you want there can't go. However, if you make that decision you can't be upset/offended when people cannot fit into your plans.

I think you have made entirely the right decision.