Long hair by itself I don't think would arouse suspicion in the average person that you CD. Many persons had Long Hair for many different reason when I was growing up and I believe the same can be said today. Some it's part of their culture and they do so to honor their past ancestors. Or they do it to be a non-conformist. Etc...
Personally... now that I'm older... I just don't care what other people think. Being myself is more important and life's to short to worry about such things. I would rather find a woman that likes me for being who I am, a gender non-conforming CDer.