Find a scale that has duel weight platforms, for say a tractor trailer setup, straddle the platforms and you can get front/rear axle weights, barring that just drive the front axle onto the scale, get the weight, then pull through until just the rear axle is on and get that weight. You will have to split the weights to get left/right but it will be close. I am lucky as my local truck scale is a four platform scale and will weigh front/rear, left right, and each wheel for $20, all at once. Most of my loaded weight is in the rear, so I run then higher. Every coach and situation will differ so you start with a 'general' seting and then adjust until you find the sweet spot.
2016 Alante 26AY
Roadmaster Braking, BlueOX Tow Bar.
Kelderman Air Ride, Safe-T-Steer, Supersteer Trak Bar rear w/ Sumo Springs.
200 amp Lithium house batt w/solar 40A charge & 2500 watt whole house Inverter.
2006 Honda CRV Toad