I'll be making a 2 month stay or so for business at a hyatt. All nights booked under 1 reservation.

There may be a weekend or two during those two months where I may travel else where and book a hotel for a night. Will I get credit for the one off one night stay?

The one off will probably credit since I wouldn't have checked out of my extended stay reservation. What will happen to the extended stay reservation when I check out...will that only partially post?

Am I better off booking a non-Hyatt for the weekend excursion?