Well I did find that the "entreset" command removed the shrooms and let me move out, save, and reload and things seem to be back to normal. I don't know what else that command does to the world however.
I'm completely stuck under some Jellyshrooms first time I took the PRAWN out. Suit can't move in any direction, I get a "SpawnNearby failed." message when I try to exit, and none of the console teleport commands do anything. I can't even "kill"...…