I wear my hair like that alot and I think I will for my wedding too and it really is quite easy. I use bobbypins to secure usually only 2 or 3 and it doesn't move.
Here are a couple pics I mostly do it when I wear my hair curly but I have done it with straight hair too and it looks good. If you ignore the stupid look on my face in the last one you can see how it is secured with the bobbypins.