The Timberline can be used for baking breads, cakes, cookies, etc. Because water boils at a lower temperature as the elevation rises above sea level, you will need to make similar changes to the recipe that you would if baking in the oven. My daughter lives outside Denver. It took her quite a while to adjust her recipes to make baked goods come out properly.
Because cooking protein is often done at lower temperatures and you are more concerned with rendering fat and connective tissue than you are boiling water, it is not necessary to make significant changes to the cook methods. However, if the humidity of the air is low, there may not be sufficient moisture in the wood chips to keep adequate humidity within the cooking chamber. Thus, keeping a pan of water, apple juice, cider vinegar, or beer in the chamber might be helpful. Even though I am only at 900 ft elevation, I often use a mixture of water, apple juice, and vinegar in equal proportions.