RE: Montana unit 630,31,32 mule deer?
What time are you planning on hunting?
I think you are going to have a better chance of success on a big buck sticking around Custer County or Powder River County.
There are a few bigger bucks in those units, but you probably aren't going to see them until mid November. Last year there were a TON of younger bucks around, but not too many big ones. I shot the only 5x5 (if you count brow tines) that I saw and it was a decent buck but not a monster by any means. It had a 21"inside spreadand tall backs and it scored 145".
I hunt that area because it is where I grew up, and my mom still lives in Glasgow, but if I didn't have a connection to the area I would probably be looking for big mulies in the Southeast corner of the state.
That's my 2 cents. Probably not worth that much.
Nathan