Looks like permits have moved to recreation.gov this year so hackjohn is broken again. I assume the permit application process has otherwise remained the same, but I haven't looked into it in detail. Either way, it could be a substantial amount of work to update hackjohn.
I don't have the time to work on this at the moment but it's possible I will later this spring or summer. If anyone else wants to take a stab at it I can offer some help as needed.