I booked a stay at a Hyatt (La Jolla) a few months ago and need to shorten it by one night. I couldn't adjust the reservation directly on the website, so I contacted my concierge. She told me that because the rate has since increased, changing the length of the stay would trigger the higher rate. That is, it'd be as if I canceled the reservation and made a new one.

This seems pretty absurd to me. So I'm thinking of just keeping the original reservation, then asking to check out a day early when I arrive. I can't find any information about early check-out fees, however. Does anyone have experience with this? In case that makes a difference, I'm a Globalist, and I booked a cash rate + points upgrade to a suite.