Friend's wedding.....help!

I'm lost as what to do about my friend's wedding. She wants me to be a bridesmaid at the wedding. The thing is is that

1) I'll be 5 weeks PP

2) my husband and I will have to drive about 24hrs round trip with the baby of course. Driving because it's cheaper....

3) my friend has made the rule that the only children allowed at the wedding are nieces and nephews. So that means even though my husband was invited....he's gonna be stuck sitting at the hotel room with our baby while I'm at the wedding.

I know it's her wedding and I respect her wishes....I just feel offended that I can't bring my newborn so therefore my husband has to leave too. Plus I'm going to be breastfeeding and am unsure about how my supply will be and how long I can be away from baby if I don't have anything pumped....

I feel bad in a sense too because I'll be not working at the time, so to spend 300 or so bucks for the trip to only be able to be at the wedding for a couple hours....and thats not including a nice gift I'd wanna buy her. ugh =( I feel like such a bad friend for this....

What would you do? Would you go?