Same person for Engagement Photos as the Wedding Day photos?

I'm using the same photographer for both, it gave us a chance to get to know her personally before our wedding and she learned a lot about us.

As for ideas on posing/what to do in photos, what I did before we went to our engagement shoot was I simply Googled the location and "engagement photos" and looked at the images that came up. It's a good way to see a variety of photographers and what areas they used with their clients so when it comes time for you to take yours, you have some spots picked out!

I would recommend getting them done with your wedding photographer just so you get a feel for how they work and you grow comfortable working with them by your wedding! They usually have engagement pictures included in the price of the wedding packages