I opened up your map, and love the Zangarmarsh, it reminded me of the Muddletop Moors out of Alan Dean Foster's Spellsinger series, and is populated by sentient, empathic mushrooms that basically exude depression so creatures travelling through lose their will to move on, settle down to sleep, die and become mushroom food. Great series for anyone who hasn't read it.
To the OP, I played in my younger days, usually gratuitous Monty Haul campaigns that really lost the point of the actual game, but still had fun with it. I always toyed with the idea of going to a gaming center and joining in, we got more than a few around here.