You need to know the weight on each wheel, each axle and the all up weight. If you are towing, you should also weigh the toad. The LD should be weighed with the gas and propane tanks full and the fresh water about 1/2 full. All gear normally carried and all humans should be aboard for the weigh in. You should seek out a segmented scale, rather than a platform scale.
This document explains in detail how to obtain all of the needed weights. You will want to download and print it out. The Single Axle RV is the section for your Lazy Daze.
Informative video by Michelin on tires, leveling and weighing.