I purchased a dated ticket on Klook, along with an early entry pass, since my flight was arriving at 07:00, and I had to be back at the airport for a 15:15 connecting flight (last Friday in November). Getting to the park via taxi was a breeze (HK$150). Only after passing through the early entry checkpoint did I notice that my park ticket specified that I still needed to make a reservation. Fortunately, I was able to log on to my account and book the reservation while I was waiting for the park to open up for early entry. Lesson learned: dated tickets on Klook are not really dated tickets, they are just priced for the appropriate tier of the day you select.
As for the actual park experience, there was a decent but not terrible queue at 08:30 for the early entry. There is a luggage storage spot about 1/3 the way to the park entrance from the rail/bus/taxi area (HK$150). The lockers inside the park are fairly small and cost the same (HK$150) as the luggage storage, so there is zero benefit carrying your bags through security and into the park. I have been to this park many times, but not since December 2019, before Frozen opened up. I was able to ride both Frozen rides twice, as well as Winnie the Pooh once, before the official park opening at 10:00 (never waited more than a couple minutes). The area with Mystic Manor (possibly my favorite Disney ride in any park worldwide) didn't open until 10:30, which gave me some time to shop. The busiest parts of the park were definitely the shops, so I highly recommend purchasing early entry and hitting all the rides as early as possible, while people are distracted taking photos and lining up to purchase limited edition junk. Most of the rides still had a very short or nonexistent line by the time I left around noon.
Getting back to the airport was also easy, as there were already two taxis queued up at 12:30. The 15 minute return journey was about the same cost (HK$150). If you have time to spare, I definitely recommend riding the Disneyland Resort Line at least once, as the train is quite adorable. AFAIC, the train is the only sensible option for getting to/from the city, but it is not so great for the airport (need to backtrack to Tsing Yi to catch the Airport Express or hassle with a bus at Tung Chung).