I wouldn't do it, either, but neither would my DH! We all have our limits. DH just wouldn't want to be responsible for everything, and he wouldn't camp at all. We did one supported (sort of) tour with camping and we found that while we like camping, we don't like it when it's combined with riding.
I don't especially enjoy long hours in the saddle by myself. My navigation skills are just OK, and frankly, I like to know where I am going, conditions, etc. I am always anxious in the beginning of any ride that I haven't done before, whether it's in my area or not. I've trained myself to calm down, but being on a group tour makes me feel safe. I don't necessarily ride with the group, but I am always with one person. I just don't like the feeling of being out there, alone.