And then a dragon spawns and bugs the quest...

The tour isn't necessary for the quest(s), just go into the hall of elements and do the demonstration.

Thanks I was already thinking there'd be no solution for this!

The key with bugs is just make plenty of saves, then you can reload if there is a problem. Thats how I have a pretty much bug free game.

Just started a new game earlier on master, 3 hired thugs decided to attack me during the first dragon fight, was the worst time ha.