Hi Pete,
No probs - ask away! To change settings, you need to go the the site manager (yourwiki.wikidot.com/admin:manage) while logged in as an administrator or the site owner.
If you then click on "Membership" you can choose how to manage membership. Wikiwood is set up as "membership by password." You choose a password and tell it to those Wikidot members you want to join your wiki. They need to log in to their Wikidot account and go to yourwiki.wikidot.com/system:join and put in the password.
If you prefer, you can set up a completely private wiki, where you have to be a member even to see the wiki pages and files. You can do this by going to "Public or private" in the site manager.
Don't forget that you might also need to alter "Permissions" in the site manager to control who is allowed to create, edit or delete pages. e.g. you might want to make Regia local group leaders mods of the wiki and then only allow mods to delete pages. To make someone a moderator, go to "Members -> list members" in the site manager, click "options" for the person you;ve chosen and then "to moderators."
Hope this helps,
Freya
