Given the task definition and input, reply with output. Given the background description of some cooking related query, summarize the question into a title

Recipes for smoking brisket typically recommend a temperature of 225 F. My weber smokey mountain has a water pan to help regulate the temperature. But what if I am able to maintain that temperature without a waterpan? Would it cook the same way or is the humidity necessary when smoking brisket?
How important is humidity when smoking a brisket?