What do I need to take with me?
There are 3 key things to take- photo ID, cash / cards and the Itinerary with maps & directions.
If you have all of the above then in theory you do not need to bring anything else.
Include all the usual things that you would take on holiday including outdoor or old clothes if these are appropriate. Include any medications and hangover cures that you might need. Apart from that bring what you like.