Good list and info. I guess I fly a bit more by the seat of my pants. There are obviously some things that must be done before others and I suppose I just have a constant list in my mind. Different sites and situations make me do some things in a different order. Also, I have a bunch of kids and wife always throwing a wrench in my plans.
For example, someone is still using the bathroom so I can't dump and unhook sewer hoses yet. But, if the site is level I can hook to the truck and take the chocks off the wheels. If on a slanted site that's not a good idea with people in the 5th and the slides out.
I was much more regimented when I was starting out. Over the years I've become a lot more flexible. My key is to double, triple, quadruple check things before pulling out. I make several complete walks around before finally pulling out and then another walk around and survey of the site I just left to be sure I didn't leave anything. I could probably be quicker/more efficient with a good list and routine but just feel better going through every thing numerous times.