I’ll add on that a lot of (most?) modern cars have some kind of “phone home” capability that can likely be tracked. Park well away from your destination, and avoid using public transportation if there’s camera surveillance there.

Make sure to bring some cash and/or a prepaid card. You never know when you’ll wish you had it.

A plyboard sign doubles as a shield, a cardboard one does not.

Consider bringing earplugs and/or headphones in case flashbangs are thrown.