Many have no idea what a full blown wildfire is like. When planning fire defensibility think a 200 foot high wall of flames approaching at 40 MPH,. I think too many farmsteads in the big drought areas this year are probably not defensible against an event like this. Fire lanes with a disk: The wild fire we had a few years ago jumped the Missouri river -- here that's about a 100 year event so it wasn't a complete fluke. Highways and gravel roads don't even slow it down and sometimes it will even set the asphalt paving afire. Evergreen trees closer than 50 feet to a house will probably cost you the house. Vinyl siding will burn like gasoline. Several of my neighbors waited too long before abandoning the place and ended up driving through a wall of flames with flames licking into the cab from cracks around the vehicle doors. It is a true miracle that no one was killed but ironically most of their houses didn't burn so they could have stayed inside until the flame front passed. Another house ended up with several fires in the attic caused by flames licking through the eave vents. FD managed to kinda save the house but it was so smoked up that they would have probably been better off to have let it go.
Scary stuff but a little forethought and planning might be worthwhile.