Welcome to the forum and congratulations!
That is a nice rig. Camp out a night or two close by as a shake-down to get familiar with all your appliance operations. You'll also begin to learn what you need to pack and what you don't based on space available and whether it turns out you will truly use it.
For the first few months of ownership, I learned something new about my "b" nearly every day. Heck, after nearly two years, I still learn something new now and again.