All good. I'd noticed the different tool tip mentioning the "travel for a day" but obviously didn't try interacting with the gate from that distance. Keep up the great work.
I'm sure this is "User Error", but I can't seem to find the map for Act III. The quest from the cleric is telling me to exit via the south gate and enter the Neverwinter Woods, but I can't find a travel point on the map in the Neverwinter Woods that is unlocked.