We were advised by someone that half a day would be plenty at Disneyland... so we purchased 1 day tickets at Hong Kong airport when we arrived (from the Disney store in Terminal 3). We had 3 children   4, 7 & 9yo. In hindsight... we wish we had of got the 2 day pass.We arrived at 10.30am to discover that the Frozen  land  was completely booked out for the entire day. Apparently you have to arrive at 9am, reservation tickets are issued at 9.30am, and they were all gone by 10am. And the tickets give you access to the entire Frozen section as well as the show. Without the tickets   you cannot go into the  Frozen land  at all. It was a hot day, and there is an insane amount of umbrellas. We went on a Friday and it felt incredibly busy. We later discovered that it was school holidays in China... so that would have made it busier than usual. Bags were checked when entering Disneyland... so I assume that BYO food drinks is not permitted. So bring lots of money for food & drinks. Waits for rides were 30 45mins.... with the longest being 1 hour for a couple of the rides. (Thus the reason a 2 day pass would be preferable). We ran out of time to even see one of the worlds.... but it was an enjoyable day. The Lion King show was great.... so do try to see that.We watched the two parades, and stayed for the fireworks. And although there were 1000's of people leaving at the same time... the train ride was bearable. Tips:  go early, particularly if you want to see the Frozen world  try to avoid going in the middle of summer, but if you have to   take an umbrella and or fan. There is not much shade anywhere in Disneyland.  try to avoid school holiday times if possible.  try to go on weekdays. I've heard that weekends are incredibly busy.  if you have more than 1 child, or young children   buy a 2 day pass so you are not pressured to see everything in one day.   Buy stuff at the Disney stores at the airport (2 stores in Terminal 3, and 1 when you go through the gate). We got some great bargains at the airport stores.