Anticipation of a major event .. I need advice on this...?

Put yourself in the character's shoes, so to speak. Think of how you act when something you've been waiting for arrives. With words, show in every action that his every thought is centered on going to the casino. "Live it" in your mind before you write it as if you are him and going through a scene step by step. An example: maybe he is in the middle of eating breakfast at the table with someone and suddenly jumps up and sprints to the window. He'd thought it was his friends beeping the car horn and the other person laughs because the noise was only the timer on the oven going off b/c the biscuits are done. (also, how does he talk? walk? does he trip over the dog b/c he's too busy thinking about how to play blackjack?)