@mcnado All good info! Having been in this situation I'd also suggest:
Bottled water. Don't fool around with 12 or 20oz bottles, get a couple gallon jugs. Moving around in the middle of the night with smoke rolling in is thirsty work.
Face masks. Anything is preferable to nothing. Smoke arrives before fire; even if you get clear there's a risk of issues related to smoke inhalation (especially if you have breathing issues already).
Cash. Stick a hundred bucks in your go bag. Enough to grab some food/fuel if needed. There will be power outages; 50 miles away you may find businesses with no power (and no card reader).
Keep your vehicle in good repair. Tires aired up, washer fluid, good wipers, tank over half-full.
If you're really remote, get some dehydrated food. Throw a couple packs in the car. They last for decades and all you need is some of that water to have a quick (albeit very high sodium) snack.
Remember nothing you own is worth asphyxiating over (the most likely cause of death in this scenario).