In case you haven't yet discovered The MAGA Hat Chronicles, it's a fun blog about a New Yorker's daily experiences as he traverses the city in his red or blue MAGA hats. Some of the reactions of people in the city may surprise you. He's been doing it for weeks, and overall, it seems to have been a mostly positive experience for him. But he's a big guy apparently, as well as extroverted, gregarious and talkative.
Also, Trump supporters are promoting a "MAGA HAT DAY" for tomorrow. I don't think this has been promoted enough to have any impact, but people are being encouraged to wear their MAGA hats in public and to post selfies of themselves wearing it on social media.
We'll see how it goes.