Us blackjack players can always get good rates.
1) Ring the MC and ask to speak to a casino host.
2) Convince the casino host that on average you'll bet around $50 per hand for a 4 hr period each day of your stay (or $25 per hand for 6-8 hours).
3) Tell them that you're aware of the recent fire but wanted to show your support for the property by coming to stay and play.
4) At least, you should get your room at CASINO RATE (much cheaper than the lowest published public rate). At best, if you actually reach the bet limits in 2 above, you could get free room, food and beverage for your stay!
I found the following book, comp city, really useful for this sort of information (see my blog entry below for details).
http://beatthecasinos.blogspot.com/2007/12/more-casino-books-worth-reading.html (Archive copy)
Good luck!