Ron, it is not a big promotion to try and sell you equipment. I have done two Canon Photography in the Parks. You can use any of their equipment if you wish, but there is no pressure, they are equally happy if you bring your own camera. It doesn't even matter what brand of camera it is or what level you shoot at. It is a free workshop period. In fact, the first one I attended I had a Canon 20d and I wanted to try out a Canon 5D ff camera. I didn't like it so I ended up upgrading to a 50D instead, which sold for about half of what the 5D sold for. I really enjoyed trying out the macro circle flash units. If I ever get into macro heavily I will have to get one.
In fact, they don't have anything to sell you and they don't even know the prices.