Theodore Roosevelt NP

Hi,

next June I plan to visit Theodore Roosevelt NP as part of a trip around
Wyoming, North Dakota and South Dakota.
I'm looking for some advice. In particular, these are some of the questions
that are roaming in my mind:

-Is it worth visiting also the North Unit?
-How much time should I plan for this park considering that, besides the
scenic drives, I plan to have just a couple of moderate hikes?
-Which motel would you suggest in Medora?
-Is there any scenic drive, very nice State Park, cool spot on the way from
Medora to Rapid City?
-Which hikes would you suggest?

Thanks a lot,

Giulio