This is slightly off topic, but I don't think I would like an all women's group tour. I don't know, maybe it's me, but I find groups of women often have all kinds of weird dynamics going on. I have plenty of women friends, but I notice in group social situations, I always seem to be chatting with the guys, and I mean in a peer to peer way, not a flirting way. If I ride in a group, I like it to be mixed.
And I would not want to share my room with a stranger. I am not modest, but I am not in college anymore; no roommates except my DH.
There are all kinds of permutations of tours. DH and I are thinking of doing a semi-supported tour with our new bikes when we get them. Someone to carry our bags, but riding on our own.