iOS using tabs in modal view to show camera/multiple photo galleries

In our app there are many pages of forms, and each page can have (or requires) photos attached to them. Photos can come from the camera, photos previously taken, or a view of certain photos from the iOS photo gallery. I don't have room for adding 3 buttons to each page so I want to make the photo functionality modal. Putting a UITabBar in a modal view seems odd (the app itself starts as a UITabBar). I could put three buttons at the bottom of the modal view and swap out the rest of the views with the camera (my own implementation not the SDK one) and the 2 galleries. Of course that is essentially a tab bar anyway. Any suggestions as to what might make the most sense?

This is what I am thinking of in the modal view. The page that would lead to this has a Photos button at the bottom plus other buttons for other features. Users are likely to take multiple photos or choose from the gallery while in this modal area. Note this is an enterprise app, not for the general public.

OF course this isn't a real UITabBarController.