I've read that. Also read a kerosene soaked rag tied around the ankles. I don't know where you'd get sulphur in bulk anymore.
Eating lots of garlic is another preventative, but it also prevents my wife from getting close to me
For sure, premethrin treated clothes and a good bug repellant will help. Getting out of those clothes and into a shower ASAP helps a lot too.
But chiggers are hungry and tenacious if nothing else, and if you step into a nest of them you are going to get bit up.
This time of year is one of the worst because for the most part they are all gone, and we're all sick and tired of using repellant, but there will still be some isolated hatches, mostly in the forested areas, and they will get you if you go in there.
I am aching to get out in the forests right now, but past experience has taught me that I have to wait at least until after the 15th of the month to do it, else I'll surely get bit up. By the end of the month the forests will be safe again