A snorkel isn't a bad investment, just remember that they have their limitations, A bow wave over your bonnet can send water down your snorkel and kill an engine pretty quick.
Don't let a snorkel allow you to think you can ford deep water, you'll start to float as soon as the water is near your bonnet in depth, and current can be deadly.
An auto offers a lot more control overall if you are getting into rough territory, but as already stated, 2 low for most stuff, 3rd if you are travelling quicker. Drive for the gravel roads.
Use low range sooner rather than later so you don't overload and overheat your auto. Get out and experiment with the wagon, you;; get the hand of the auto.
In my auto Prado KZJ78 even if I lock the box in low first, if I am travelling too fast it won't change down and lock up until I get below a certain rev and speed range. Once locked in Low 1st, it will crawl down the steepest hill etc. with virtually no need for braking.
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