We also widened the access road on our property to support larger fire trucks and dozers. Obviously, fire-resistant construction materials and techniques are a huge help and not all require extensive retrofitting. There are spark resistant attic air access covers which are easy to install. We needed to re-roof and remodel anyway so we went with fire-resistant roofing and concrete siding. It's also important to have non-cellular local communications because the cell towers often go out first (our community uses 2-meter handsets for emergency comms). Doing those things along with the fact we've cleared all trees and brush out beyond 300 feet and only have metal out-buildings caused our local fire chief to comment that if everyone did what we've done, protecting the whole region would be three times easier. We also have enough generator power (on auto-failover) to pump our own well water to wet down our house and surroundings. With that our house has a really strong probability of surviving with no external help even if our property is directly hit by a major wildfire.
Edit to Add: I forgot to mention another key thing. If you live in a place like this, there's often only a single narrow public road serving your property and others nearby. Make sure you have transportation that'll let you get out cross-country if the road is blocked by either fire or heavy equipment. We have AWD ATVs fueled and always ready to go (plus they are handy around big properties like this). Between us and our neighbors we have a plan to get everyone on our road out without outside help - including a few elderly folk who will need assistance. Firefighters needing to rescue unprepared residents diverts vital resources from fighting the fire and clogs roads - which just makes everything else worse.