Also if you aren't in a big city and going to a smaller event I have less advice from experience. But I think the "smaller" protests in less expected places are very important. Try to find a way to let everyone know about your massive event with two dozen people in a small town. That's part of "everyone is doing it" too.
Find a way to let your more right-leaning relatives know that you went.
It will change the way they see the news coverage since they will need to try to place you... who they might not totally like, but who they do at least understand to some degree as a part of that story.
Also if you aren't in a big city and going to a smaller event I have less advice from experience. But I think the "smaller" protests in less expected places are very important. Try to find a way to let everyone know about your massive event with two dozen people in a small town. That's part of "everyone is doing it" too.