Just a step stool will work. Also helpful for the shelves above the closet and the top of the Hoosier Cabinet.
The leaking water ran off the back edge of the last full ceiling panel, into the retaining strip, then over to the ODS wall where the retaining strip meets the crown moulding. From there it dripped on the top of the valance over the emergency exit window then leached down to the scalloped bottom edge of the valance ending with a puddle on the end table. Good thing the kids were sleeping on the air bed and the splash woke them. No damage noticed.
FYI: the ceiling panels are held up by the retaining strips which clip into a track that runs the width of the trailer. i.e., the panels float... pun intended.
The recipe for perpetual ignorance is:
Be satisfied with your opinions
and content with your knowledge.