It looks like we've run out of observations about the effect on an Escape of rough roads, and suggestions for managing the effect of jolting on trailer contents. An obvious remaining topic is reducing the jolting with suspension improvement. There's no need to reopen the discussion here, but I suggest a look at previous discussions of adding shock absorbers, which would reduce the jolting.
Also, the washboard question was the subject of a previous discussion: Washboard roads
There is also the previous extended discussion of rough roads in general: Any Damage From Driving on Rough Roads?