Clyde, your question probably has no definate answer, as there are a lot of variables, but you will likely be well under gross (without baggage), and book performance numbers should be pretty close for a given altitude. Most of the fields you'll be operating out of in the Smokies are under 3,500' elevation, and if you can get in and out with a 182, you can do the same with a 150, only just a little bit slower!
