Speculation on getting to Crimsonwood Keep? Please read.

Its more then likely another enterance to the big foot boss map(the main one).
At least thats where the other signposts took me(to evil rising).

Anyone figure out how to trigger the reactor(I'm assuming the firewood is a reactor) above the basecamp?

Whacking it, throwing stars at it, hitting up, jumping down, and dropping a phantom seed doesn't work.