There's two I'd think of off the bat. 
#1 Dal Outfitters who's a Sponsor here. I had an opportunity to hunt with them and saw several nice muley bucks including one over 30" that stood there only 30 yards away. This is fully guided
#2 JML Outfitters, a new acquaintance of mine who specializes in drop camps in the Flat Tops of Colorado.  This would be more of a do it yourself hunt where they pack you in 3 miles and you hunt on your own.  Of course the price is much more reasonable. She's in Unit 24 about 30 miles East of Meeker, CO.   I have brochures, but if you want more info just call Marie at 970-878-4749 and tell her Petey from huntchat.com sent you.