The most important rule. IF YOU CAN SEE THE FIRE AT ALL, GO.
I'm an Aussie, from the country, we saw a lot of fires when I was growing up. It moves soich faster than you can imagine. In good condition ditiona it can go faster than you can drive.
Be careful, gods speed buddy.
Edit, as mentioned : if safe turn off gas.
2nd edit as techjuice said: legal documents and video, but this is the last thing. Documents won't help your family if you don't get out.
Look I'm not kidding about how fast fire can move, if you can see it, it's panic time.
Also, I emailed you, if you need to ask a question, drop me a email with your skype, I'll call and answer anything I can.
Edit: email I sent to op, for anyone else's info:
Okay, now I'm sorry if some things sound like I'm talking down to you. I'm just going to explain as I know it (also forgive typos I'm on a phone).
Driving through a fire- even on a road is not a plan. Ever. It starves the engine of oxygen and the vehicle will stall. Bad place for it. Only ever do it if it's an emergency.
Fire will move faster than you. Yes it takes days sometimes to move a few hundred feet, but Murphy is an arsehole and fire can move faster than you can drive, if the conditions are right.
Clothing; hot and cold, you don't know where you will be, pure cotton is better than synthetic, synth melt if your in fire, melting is worse than burn.(you have to take it out of the skin if it melts).
Water, lots.
First aid kits: if you have it bring it, alovera plants are an amazing treatment for burns, snap a small part off and run the juice over the burn. If there is a burn with a melt(eg clothing, plastic etc), and if it's safe, do not pour cold water on, it will set the melt, try and remove as much as possible (without touching the burn), before applying water.
I'll write more after this email. If you are forced to drive through fire, a)very. Fucking. Dangerous. B) all windows up, clothing(cotton) around mouth and nose. Be. Careful.(gods I hope you don't get into this)
Again. If you can see the fire, get. Out.
I don't have much more for during the fire, some people recommend sprinklers, watering roof etc, I believe that's an edge case. Yes if you have time, it may help, but there is no reason to risk your family for it.
Lives can be rebuilt, life cannot.