Hen do when baby is 6 weeks old?

Im bridesmaid and planning my best friends hen do, the chosen weekend is when the baby will be 6 weeks old, its only for one night! im starting to feel a bit anxious about whether i'll be well enough to go to it or not?? Im a frist time mum so i havent a clue what to expect! Anyone with any more experience able to tell me how youd feel at that stage after pregnancy. Im hoping to try to breast feed, so could express