The suggestion to create a list is a great one! It will definitely lower your anxiety over whether you packed everything or checked everything before flight. Eventually, if you continue camping in the Class A, you will memorize everything and it will become second nature to you. And the more you drive the rig, the more comfortable you will become with it. Even if you're not camping, take it out on a drive around the county you live in. Get used to driving it on secondary roads as well as on interstates. Familiarize yourself with all the systems and how each of them works. The only true way to get comfortable with it is to use it!