Good on you for being cautious and at least recognizing the possibility of the risk. The weather will allow for comfortable (desirable) outdoor eating. You can socially distance yourself in groceries and other stores for the short time you will be in those places. I've been to the Moto GP race in Austin before COVID, and although crowded, it's all outside and you will have numerous opportunities to enjoy the race separated from the crowd.
Perhaps your biggest risk is that, should you need medical attention for anything, especially a hospital, those resources are not as available as they were, due to taxing demands from COVID. No one is being left for dead in the Streets, but lengthy wait times and experiences of being "bumped" for sicker/more hurt patients are common.
FWIW - I've been very COVID careful since the beginning, and if I were you, I'd go without a doubt. With common sense and your vaccine, you are as protected as you can be.
So go! Enjoy the trip. You should be fine. Have a great trip!