Sorry to have to say it, but that really wasn't an enjoyable evening for me.
Confusion and chaos reigned again from the start ("We'll need pickaxes or shovels"? Really? Why not hint that before event start time?). People who roughly knew the layout of the caves got lost and went round in circles (not helped at all by the layout of the paths meaning if you 'fell off' one you had to hike for miles around the maze to get back again), some folks had technical problems getting things like the 'boulder' or the gate to work (including people who could not get any result from the password at the gate, which seemed to be a result of a character problem with some language keyboards). Even simple stuff like getting the message from Fynn on the Event channel 'Gather with me please', when unless you are already on the screen with him you have NO clue where the hell is meant....
Players found some workrounds to the entrances issues, and people getting lost, but it was very, very messy. I hope others had a better time than me, but I can't say I'm planning to attend any more 'events' that turn out like that, it just was more frustration than fun