$20? Park at a grocery store and get an Uber. Might be in the $20-30 range but if you want to be within reasonable walking distance to the stadium it’s $40-60 easily. At least with the higher end, you’ll get to tailgate around fans. But a heads up, our stadium parking is an absolute nightmare trying to leave and there’s no help from police or anyone. You might sit in one spot for over an hour without moving.