I've been doing some research on this, since I'm going to Alberta this fall. Mike's is a good one, and he just bought some more licenses near Peace River. From what I can find out, the very best at present is Scott Taylor with Bear Paw Outfitters near Peace River. His website says that he took 20 mule deer hunters in 2004 and was 100% successful, with the average B &C score being 189. Look at his website - some real monsters taken. The bad news is tha he's now booking for 2007 and the price is $6500.
I found the website by doing a Google search for Bear Paw Outfitters Alberta.
Good luck. There are some real great deer being take in Alberta right now, and they had a mild winter, so this could be another great year.