While POR is beautiful, because you are going during a busy time (its school vacation week here in Mass., and I think the entire country has Presidents Day off), I highly recommend Coronado like some PPs. Its very calm - for a Disney resort - and beautiful, and caters (unofficially, just the 'feel' to me personally) to more of an adult crowd b/c of the conventions. Of course there are kids there. The onsite TS restaurant is great, I think, and well themed (which is the reason I stay onsite - the theming (I can stay at a Best Western anywhere)).
An interesting thing about Coronado is that they have several bookable room categories that are in between going from regular room to concierge/club level. Check them out. Oh - and because you arent' shlepping kids, strollers, whining, you can save money by booking standard - i.e., while its a big resort, you can stay in the quiet outer buildings and enjoy a nice walk free of tired kids.