Some of us drive either on horrible roads or way too fast, but I have had clothes fall off all the time until I cut a one inch thick piece of "kayak foam" the closed cell foam used for flotation, and wedge these between the curtain rod and shelf once hangers are in place. This reduces problems to nearly zero, but apparently some of the roads still have bumps enough to even dislodge these.
But, I am actually dropping my trailer tire pressures to 60 psi (16 inch LT tires) which according to Firestone is about correct for my 7300 lbs on four wheels, when hitched to TV.
Maybe tire pressures have more of an influence than I had realized.
Ms Tommie Lauer
2015 Serenity 30 RB / 2008 Dodge Cummins 4 X 4
WBCCI #4165 AIR #31871
Happy trails and Good Luck
Ms Tommie Fantine Lauer, Greensboro, NC
AIR #31871 WBCCI #4165 K4MTL