My entry level, and much maligned brand, has been through it all. Some of it would even make Robert Ryan take notice. The fridge and drawers have opened. Various "stuff" has dispersed all over. I've found kitchen items in the bathroom, etc. As mentioned, the occasional screw comes loose. I think if you drive for the conditions, pretty much any trailer will be OK. No need to be in a hurry when the road or path is disagreeable.
I like that term, "Sierra Stripe". I'll have to remember it.
I also think the washboards are probably ones worst enemy. It gets very old, but I drive those kinds of roads pretty slowly.
