Wear a face/eyes covering (e.g. mask and goggles), long black clothes that cover any body identifiers (e.g. tattoos), and perhaps some Kevlar gloves if you are paranoid. Ideally cycle to the location to & from a discreet clothes-changing station. The main threat here is doxxing and not legal-related.

I would approach this with the same caution that the Black Bloc approaches protests, especially since the "safety in numbers" is less of a factor here. Although if you are willing to accept some social risk, feel free to drop some of the more prohibitive precautions.