Welcome aboard, Bob —
Sounds like you know what you are doing.
We picked up a FF 189FBS about 2.5 months ago — got it all modified to our needs and preferences. Then we were ready to use it when the Creek Fire here in the California Sierras hit on 9/4. We were evacuated for 19 days. Our home was safe (lost all food in the fridge and freezers) — but many neighbors lost everything. Currently at 330,000 acres and 49% containment.
We did not use the FF to stay in because my sister offered her home about 2 hours away up in Merced — but we took the FF with us — and it was very reassuring to have it with us in case it was needed. 5 cats, a dog, my wife, and I.
Sounds like you will really enjoy your 233.