F.J. and Ellen make some very good points here. I know that when we did our walkthrough, there is SO MUCH information that you are trying to absorb....it's easy to forget something. I found that the easiest mistakes to make are in the order that things are to be done...a video would allow you view and review as many times as necessary until you felt comfortable.
If you can't video, take lots of notes that can be turned into a checklists.
One thing that we didn't check at the walkthrough that I wish I had is the outside shower...check it for pressure and leaks.
Most of all, enjoy your new home on wheels...after all it IS part of the family now.
8)