My boyfriend and I are looking into booking our yearly HHN hotel. We are currently planning on going to Aventura (just a plain room). However, one of my friends has expressed interest in joining us; if she did, we would rather jump over to Surfside and get one of their two bedrooms (assuming, of course, that there are any available). We most likely will not know if she's firm on coming until May. Worst case scenario, we all get to be real good friends for a couple days.. TL;DR: If we book Aventura, would it be possible to change to Surfside at a later date?