at 6am corniche will be jam pack already. The perpared seats will be full as early as 5am. So its up to you where you want to stay. For the traffic, yes it is tremendous! 2-3hrs for the normal 15mins drive. So where do you stay here? if you are about 2-3kms away to the corniche its better to walk than drive. Never take a taxi! it is the same for the evening fireworks(8pm). Everyone are welcome to the celebration. See you there!