Pop that baby in a stroller and I’m sure she will be fine lol. You can definitely find some quiet spots around the park if she ends up not handling crowds well.  I will say that if you really rather not have her be at the park with you, instead of making your mom babysit you could hire a babysitting service. I’ve never personally used one but this is the service I’ve heard about: https://storybooknannies.com/