Anytime you want to know the total weight of your rig, all you need to do is go to your local truck stop!
Park somewhere (in a designated space!), walk inside, and ask someone at the fuel desk for a “non-commercial” weigh ticket. This let them know that you’re not a Commercial driver, and they’ll log it differently in their system. Commercial drivers have to provide Truck, Trailer, and load numbers, along with Company name and other stuff, which you won’t have since you’re personal use.
After they give you the okay, go back to your rig, and drive slowly onto the scale, lining up in the center (left to right), and making sure your axle sets are in different sections of the scale. If you stop with the speaker/microphone box just outside your drivers window, you should be fine, and you can ask for a little help over the speaker/mic to get adjusted correctly.
Once you’ve settled down, they’ll let you know they’ve got your weight, so clear the scale (ALWAYS DRIVE SLOWLY on the scale!), park, and go get your ticket inside!