Adding a night & hotel availability

We decided to fly out a night early because of crappy flight times. Anyway, WDW says no availability at Pop (where are are staying the rest of our trip). But I can see availability through third party sites like trip advisor. Is there any way that I can book third party and have the two reservations combined? Or have WDW overrode & add that night?

Are you sure they are really available? Often 3rd party sites “say” they have rooms, but once you go all the way through the booking process up to the point where you are about to pay that’s when they’ll say “Opps! Nothing is available.”

I had this happen a couple weeks ago when trying to do a last minute trip for a potential college visit for my DD.