Invited to adults only wedding

My husband and I are invited to an adults only wedding and reception when our baby will be about 7 weeks old.  So far I am planning to breastfeed and don't really have plans to pump or get into bottle feeding.  We need to rsvp to the wedding soon.  Is there any possible way I can leave the baby for a few hours to go to the wedding?  I'm thinking no, but as a ftm, I have such a hard time envisioning what the day to day will be like.  Please excuse my ignorance. :)