OK, not all that many women participated, but one thing is clear. Women's hair-covering is a very individualistic mitzvah. What I mean is that the vast, vast majority of women to observe that mitzvah wear a large varieties of hair-covering.
For very few women is there just one way to cover her hair. Most of us probably have a ridiculously large variety of hats, scarves and wigs for those who wear them. I even have some wigs, but I wear them on Purim, and when my kids were in school they'd borrow them as theater costumes.
I've heard a couple of interesting approaches about hair-covering by rabbis. One American rabbi would tell women that it's not worth the fight, the risk of Shalom Bayit, Peace in the Home, to insist on covering your hair if your husband hates the idea of it. He even used the word, "custom," fudging the halachic (Jewish Law) basis. I think he's mistaken. He should have tried to work with the wary husbands to help them make peace with the idea that their wives should cover hair. It would have been better to empower the husband to help choose the type of hair-covering.
That brings me to the psak and great insistence the Lebovitche Rebbe had that women should wear wigs. His rationale was that more women would accept the mitzvah if they could wear a wig. Make the woman love the hair-covering and she'll love the Mitzvah.
Think of it this way: