everyone with technical info sounds great. i can tell you from experience the feeling of being whipped off a highway by too great a load on a trailer is sickening.
did it once trying to return some pressure treated lumber to the home depot. fortunately, nobody hurt, edge of highway modern with gentle downward sloping broad, grassy area. no warning, just flung off the pavement in a great sideways arc. soft landing but i wouldn't want anyone to have this happen, especially in a mountainous setting such as campers often travel through.