I'd recommend enabling the admin site on just about every type of project. The cost of setting it up is pretty low, and it gives you a reasonably convenient mechanism for inspecting and modifying your site.
If your site has mostly a one way flow of information, from webmaster to visitors, then the admin site is probably all you need.
If, however, your site has a richer interaction among its users, you will need to compose django views that can enable that interaction while also limiting access to what users can really do.
