If you are an Escapees member they they offer a "Smart Weigh" service. They give you an exact weight on each side wheel set on all axles. You can google search Escapees Smart Weigh and learn more. They offer it at many rallies and when not at rallies they offer it at some of the Escapees owned parks. There is a reasonable cost.
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V
It's important to know side-to-side weights by axle since all tires on an axle need to be filled to the pressure that's appropriate for the heaviest side. Absent this information, it's a good idea to fill your tires to 110% of the psi specified by the tables to allow for side-to-side variance.
2002 Itasca Suncruiser 35U