Breastfeeding and going out

Hi everyone! I‘m pregnant with my first baby, will have him in May 2024. 2 months before getting pregnant I bought tickets to the concert of my favorite band that is in June 2024. I really wanna go, but I need advice of people who already had babies and breastfed. The expected date of birth of my son is 14-16th of May and the concert is 3rd of June. Do you think I‘ll be able to go? If I pump before and after the concert? I also was thinking to introduce formula to the baby right away so my husband can feed him while I‘m gone if there won’t be enough breastmilk prepared. I really have no idea how all breastfeeding thing works and will my body be able to go without pumping for 3-4 hours.. Did anyone have any similar experience? Or should I just cancel this concert and it’s not worth it..?

Thank you all very much.