I stayed in the Hyatt, and it was quite nice. Because her room was paid by WizKids, Rain stayed in the Marriott - I don't think she had any serious issues. Can't say anything about the Hilton, other than the fact that almost no con event occurs there besides Registration, so you would have to deal with mundanes.

I hope to go, but my situations is so wacky right now, I can't say for sure...