Could any one make a connection so you only need to make one account on one of the wikis and be able to sign in to which ever wiki we want to edit.
Not possible, unfortunately. It's been suggested multiple times before, but because the wikis all exist independently and on separate servers, it wouldn't be possible to connect the user tables of every wiki. There is OpenID (http://www.mediawiki.org/wiki/Extension:OpenID), but support for that has fallen away in recent years, and there's also the possibility that not every wiki will want to opt in to any such solution; we can't force this on any of them.
oh ok
What if we make it all into one wiki?