2 Airstream and tow vehicle perfect for your needs.
3 Realistic plan on what to see what to do and how to stay cool then warm
4 understanding of "when I get there, I get there" means.
5 A sense of humor
6 Realization that some family and or friends will give you flack. Be prepares for that.
7 Leave everything behind. Don't load the trailer with anything other than (in this order) your favorite libation, box of assorted Band Aids, your favorite t shirts, clean socks, salt and pepper, your camera, poop bags if you have a dog, a few tools. Everything else can be found along the way!
Really best wishes and be prepared for your life's coolest adventure, unless you were an astronaut, Bugatti Veyron test driver, or building demolition button Presser.