Have you thought this through the midnight(aka daily quests reset) spawn for the dragon?
That means people have to wait for the day quests to reset, hurry and pick up the 3 quests related to the dragon kill spread over the quest area, if they pick them all, which is likely since they're not identified which is which and people won't remember, they'll have 3 other quests with temporary items that despawn and forces them to abandon and redo the quest, which is not obvious you need to do that if you don't already know how the quest has a temporary item and then you'll have hundred of people rushing down to do the actual killing, with people lagging behind for a while since they couldn't prepare ahead of time.
There's also a constant queue for the rats quest since there's only 1 hammer every 2 mins, the poacher quest only has 1 cage and it takes a while to reset so it's pretty annoying and with the over 30 min long pack run, this festival waste a ton of time and isn't very user friendly.
It would be a real low as far as festivals go if it weren't for the rewards, I've seen many call this the worst festival of the game.
Edit: As expected, I missed getting one quest because I was rushing even though I went around twice and it happened to be the one for the dragon kill, sigh.
Edit2: Kill credit is also buggy apparently, hit the dragon today and the Ancient Energy quest didn't complete when it died. Only thing I can think of is that I was channeling for Dragon Power as it died since it dies so quick I barely had time to do it.
Edit3: Apparently you need to pick up the Housewarming quest before the kill quest(Ancient Energy) appears, that's how I missed it on the first reset, this is even more messed up than I thought.
So 2nd reset in a row I fail to get it done, great.