It is wise to check your temps. My cs020, which should be like yours runs a little hotter in the front when loaded down, as opposed to the back.
I tend to get some direct heat from the bottom, but on long cooks the top will get done quicker.
I like the idea of seasoning without meat. I would turn on high with 2 chunks of wood for 4 hrs. You can check the top hole with a probe, mine is real close to the display.
The biggest thing is get out and cook something and have some FUN!