First post! I am transitioning into a full timer in the next month, so I have 0 credibility but this made me think:
If you wanted to test out the idea, there are websites you can make any sized magnet that you can put on your vehicle/trailer pretty cheap. In that case you could have a few different ones for specific situations if you wanted to get creative. Maybe even copy actual logos for local businesses/megachurch/city vehicles if you were in the area for a while. This way you could take them off and go into national parks and go incognito. I live in the same town as Jerry Falwell's school Liberty. It is such a huge school and they have vehicles all over town. If I saw one parked around the campus or church affiliated with it, I wouldn't think twice. I think I would rather keep a low profile but it is a fun idea to consider.