When in doubt,
Page 44 in the Keystone Owners Manual has this caution:
Each vehicle with elevated beds has a warning label listing the maximum load capacity. Failure to comply with the load capacity could cause bed failure which may result in injury. Bed(s) must be stowed in the up position during travel. Elevated beds may present a fall hazard which may result in injury. Please follow the guidelines below regarding elevated beds and the use of bed rails.
There is a "full page of information" about electric, standard, folding elevated beds and loft beds in the manual.