It’s very difficult to get the list of people who have attended the event unless you create the event as your personal profile.  I don’t know why Facebook makes it so difficult because these are people who have attended.  

I know people who just go in and modify the same event over and over so that they can invite the same people.  Again, it’s not easy.  Does anyone else have any Event tricks?

You could always make a registration page, and lead them to it from the event invitation, which is what I do.