First trip to Universal coming up in a few days. I'm borrowing a lanyard from a friend. What exactly do I need to bring into the parks? I know I need my room key, tickets, and Express Passes. I'll bring my AAA card for discounts. Will my room key be linked to my credit card so I can use it at restaurants and for lockers, or do I need to bring my credit card? Any need for my ID? Do I need cash or do all places accept credit cards? Seems like a lot to fit into one lanyard. TIA!