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.