Hi. I just bought a turkey to smoke this weekend. I bought a 20 pound bird. Just read on the web site that they recommend only a 14 pound bird. Why? I estimate the cooking time time to be around 13 hours, does this sound right. I have a master built propane smoker. There is lots of room for the big guy. Am I crazy to attempt this? Should I get a smaller bird? Can I do 2 turkeys the same weight at the same time? Thanks in advance for your replies.