Check out the firewise website. They indicate various treatments for zones of your property. If you want to keep a couple of trees near the house or shop thats fine but then take some other preventative measures for the tree. Limb them up, reduce the fuel around the base, and clear the other trees on the area. Also the Colorado State Forest Service webpage has a lot of good info.

http://www.firewise.org/Information/...ndYourHome.pdf