There are *many* solo women RVers on the road, and the number of "new girls" grows every day, particularly among the "younger" set, i.e., 30s-50s. Some are part-time, some fulltime, and their life circumstances, rig types, travel styles, where and how they overnight or stay for a week or for a month or a season, and everything else are all over the lot. I believe there are more solo women than solo men on the road; this link to blogs of solo women and men fulltimers (not complete, by any means; many don't blog!) gives a ratio that is pretty much in line with my experience.
http://wheelingit.us/blog-links-resources/
I don't get why women RVing solo seems to be such a "social anomaly" to so many people; you go, girls!