Bringing 4 month old baby to Rod Stewart concert

My husband and I are planning to go to Vegas to see Rod Stewart in Concert. We also plan on doing a little bit of site seeing too. We're thinking that it will be a week long trip. My first thought was too keep her home and let my sister keep her while we're gone but I'm breastfeeding her and I'm worried that I won't have a supply built up to leave for my sister. So now I'm thinking of just bring our daughter with us. What are your thoughts?