It is not possible to bury a freight container in a forest and have the forest look completely untouched afterwards, let alone a warren of multiple interconnected containers. The ground of the forest is full of tree roots. It might be possible to cut through the roots with the heavy bucket loader needed to move all the earth but then the trees would die afterwards. Also there would be lots of tracks and marks left from the heavy bucket loader.
At the beginning of the episode, we see aerial fireworks. Aerial fireworks are illegal in Oregon.
When Monroe is making the medicine in the spice shop it shows the labels for the bottles on the shelf (facing the camera) then later, it shows the labels again in the same day and they're completely different.