I have nfc about most of this event, but Toph for sure, will be asleep. Her dream'll seem normal to people when they first get in, but if they take one step everything will change to Toph's personal brand of vision (seismic sense, where everything is in vibrations and shapes and no color). Sighted people will eventually realize that the dreamscape is a mesh of Toph's school and her home with Lin here, and they'll run into a lot of walls. Physical walls. Of stone and metal.

Sorry.