G'day
Having worked some of those areas myself in the wet seasons I would not recommend venturing into them without a 4wd vehicle simply because in the right conditions you can of course access many of the places with a 2wd vehicle but where the problem lies is when you have a sudden change in the weather or heavy overnight rain you can find yourself stuck, that's all well and good if you have sited yourself on a high point or hard ground and can wait it out but if you have to get out for any reason like an emergency due to sickness or injury you may find yourself unable to.
I have seen it for myself and even woken to see that our vehicles have started to sink into the ground after having an overnight downpour on what looked to be hard and well packed rocky ground, one of the mates who was driving a 2wd van ( I had warned him many times about using this van) he would have been well stuck if we had not been with him, also the access tracks were very boggy and even the main track was under water in places, we towed him through the worst of it, we had to move when we did and get him back on the bitumen as further rain was on the way.
Its true people still get themselves stuck even with 4wd's but at least you have a far better chance of getting yourself out of the chit which I was able to only because of the 4wds capability, I would never recommend anyone take a 2wd vehicle off road as it would be irresponsible and also further to that if a person has to ask whether the vehicle they are using should be a 4wd or not its also possible that they could also inexperienced off road driver and also unfamiliar with the possible conditions they will encounter.
People die over here pretty much every year, many have perished due to inexperience or simply because they are too cocky and think it wont happen to them, some are experienced bush users as well, but many are not, I had a bad experience one year and even though I always take as many precautions as I can, and I can tell you when things turn to chit sometimes it can become a comedy of errors with one situation turning into another and then another, its too complicated to explain but simply put when things go wrong they can really go wrong.
Its better to be over prepared and increase your chances of survival, than to just wing it and hope for the best, better to be right then wrong :skull:
cheers
stayyerAU