I remember the two boys from the Youtube channel BoyBoy(?) speaking on Trash Taste about going to North Korea. They said it was pretty easy and apparently the simplest process they'd had. Maybe Australia is strict with that sort of thing? The only issues they had thereafter was going to the US apparently. US border people were apparently mad that they'd visited Korea for some reason.
I still need to watch their actual video of the trip: We Went To North Korea To Get A Haircut