We weigh at the beginning of every trip. Lucky for us our first fuel stop has a CAT scale. We use the CAT APP which allows you to manage the entire weigh operation from your phone. No need to speak with the operator of the scale. Quick and easy.
We have a Viair 400P Compressor hardwired to 12V in the front door side compartment of the CanyonStar. The air line extensions supplied with the Viair reach all the RV tires and the Dolly tires. I try to make it as easy as possible to use so no excuse not to air up. Also I installed Anderson Powerpole connectors so I can quickly remove the compressor and use it in another location using the original battery clamps.
If you are not familiar with Anderson Powerpole products they are great, easy to use and reliable 12v connection. These are used extensively in Ham radio. My call sign is W4JCH
I have been using Anderson PowerPole connectors for at least 20 years in ham radio and other applications. They are terrific 12VDC connectors. As you've probably noted in my signature, my callsign is W7DHC (licensed since 1974).