There are two questions in one here: Do many women like travelling alone in their truck campers, and do many women like truck campers at all? Both valid questions.
I certainly know that if I wasn't around Sally wouldn't feel confident or safe to take the camper out. Not that we live or camp anywhere unsafe, but even if you are safe, losing sleep worrying won't make for a pleasurable experience.
On the other question though - Sally was the one who pushed to have the camper in the first place, and pushed to take it to North Africa. And this year's trip to Italy was her idea too (in fact most of them are!).
And if there is any doubt about Women enjoying adventurous outdoor activities, just look at trip reports by the likes of Crosscheck.
Steve.