My mom is weird about beer and alcohol

I’m 22m in my senior year of college. We have our homecoming game in two weeks. My mom and younger sisters are planning to come. We are planning to tailgate with my friends families. I want to bring some drinks probably 2 6 packs of beer, but I’m afraid my mom will be weird about me drinking. I say that because she doesn’t drink often only on like special occasions and she is really weird when it comes to beer. I have been yelled at before at a family party to only have two drinks and she shits on my dad all the time for drinking beer. When I was home this summer she didn’t really say much when I had a beer or 2. I am responsible regarding my drinking habits and definitely would not get hammer. I need advice.