I've got a long trip to Asia & Australia planned this spring, with very little flexibility. I'm posting here in case anyone has any general advice. I'm going from NYC to HKG-SIN-MEL-SYD-ADL-DEN finally back to NYC. Aside from the initial departure and final return, my travel dates are fixed. I'm considering tacking a ski trip to Niseko, JP on the front end of the trip. This will all be paid travel but I'm not allowed to book 1st or business. I'm a DL DM and an AA Plat (expires this spring, unless I do something about it). Any advice on which airlines to look at? Any hotel recommendations? I'm a Hilton Diamond and Marriott Platinum but have been thinking of earning SPG status, especially if I can get a match/challenge. Thanks in advance!