I'm still working on the insulation in my shop...started last summer and have about one more wall to go. I have one more circuit to wire as well. You're doing a great job getting things done!
We are planning on doing a ton more camping and wheeling. I did a couple of chassis upgrades to the tow rig - SSBC brakes and some 19.5 inch wheels and tires. The "G" load range tires have a much tougher sidewall than the OEM 16 inch "E" range tires.
Says they are in Ogden, says they refill (expensive), but I don't see an address right away: https://moonlightgardensupply.com/products/co2-tank-refill