Connecting 2 iPads with a router without internet I need to connect two iPads to a network without internet connection. Can I just do it with a simple router? Is there a good type of router to share data without internet?
You can do this of course.  Any wifi router that the two iPads both support should connect them.  Just don't bother to connect to the Internet.

I'm curious as to why you need this? Most iOS apps don't do peer to peer, though some obviously do.  Bittorrent Sync for one would possibly be useful here.