Yeah, it's probably a good idea, I've seen you around and know that you're looking after a ton of wikis. I plan to keep reading the series because of the world-building, and I'll edit here when I have time.
Yeah, I'm on a lot of wikis, most of which are pretty dead, so I'm not regularly editing on them.
At the moment I will give you admin rights, after some time probably bureaucrat rights too, as I rarely give bureaucrat rights right away. I also rarely demote people, so you shouldn't worry about activity. Just edit when you want and have time, like you said.