Sign up for email from each casino company you are interested in. I get them from all over and the best deals I have seen is $19 at Circus (which I took for a few days before the convention) and $54 at MGM Grand. Most casinos websites have calendars showing rates for each day. Also look at specials. One example is Southpoint where you can get a roon for $70 per nite. Or take a 2 nite package with additional goodies for $107.