Used "Pay my way" workaround to book a 3-night stay with mixed payment (first night on points, the rest on cash), and then call customer service to change the booking to only keep the first night.
It's a destination hotel (The Lodge at Kukui’ula) which does not allow less than 3 night anywhere (hyatt or OTAs) even if you search with all cash rate. This is the different part from What Andaz Maui does (only limiting points booking)
Should I be prepared for check-in? It's likely that the front desk has never seen a one-night booking before.
Also, the booking has the following policy written, and remains unchanged after the customer service removed 2 nights.
Deposit Policy
Credit Card Deposit Required 2 NIGHT(S) DEPOSIT WILL BE CHARGED TO CREDIT CARD
Cancellation Policy
2n Deposit At Bkng/Full Fee 30d Befor Arv No Rfnd