Thanks for all of the feedback from you all.
I'll be ready for new tires in the spring so I'll be upgrading both the wheels and tires to be better suited to the weight I'm carrying. Decision now is stay with 18" or go with 19.5". Haven't found a compelling reason for either one yet.
I'll also be adding a Superspring. Looks like I'll have to get rid of the air bags altogether as it looks like they can't coexist.
Heading up to one of my kid's house next week and will use the camper for social distancing. There's a Cat scale nearby and will jump on with all tanks empty for another reading.