If its dinner at RPR with Scooby and Shaggy at Islands restaurant, i never book it, its just a matter of turning up, we stay in July, and over 3 weeks never seen the restaurant packed out. As when we went to it in July last year, there was only 3 or 4 tables had people eating at them, S&S spent about 30 mins talking to us, well Shaggy was talking. If you prefer to book i think its 30 days prior to the date when you want to eat.