I'm working on a hypothesis on the nature of Ms. Packard which runs like this (this may be old hat to you old hands but I hope you will indulge this newbie);
Josie is a spirit being akin to but substantively different from BOB & Mike. While BOB feeds on fear Josie feeds on desire or perhaps love. Josie is a less 'wild' being of a type that has enjoyed/suffered from a long association with humans. She was originally summoned and/or bound by or for Eckhardt. This suggests several possible explanations for her rapid demise at the end of episode 24. 1)It was brought about by a violation of the original of the original contract ('the party of the 2nd part shall not cause injury or death to the party of the 2nd part). 2)With the death of Eckhardt, the person she was originally bound too, her spirit was severed from this world. 3)Trumans love for her, the energy that sustained her, died and she went with it.
This has led me to consider the possibility that the Great Northern was constructed as some kind of spirit trap that caught her after her death. BOB, possibly the original target of the trap, is delighted when it catches somebeing else. This suggests that someone involved with the construction of the GN knew of the beings/lodges and was interested in containing their threat/exploting their power. If this was 'Gramps' Horne it also brings up a possible backstory involving his early death before he was able to transmit that knowledge to his boys.
Well that's the bare bones of the theory, weird and an abject failure of Occums Razor but I certainly don't think that puts it too far outside the norm for the TP world.
Thank you for your indulgence, rb
"It's not so bad as long as you can keep the fear from your mind." - D. Cooper
"I must not fear. Fear is the mind killer." - P. Atreides
"Whoever can see through all fear will always be safe" - L. tzu