I’d talk to the marketing department at some of the properties in Vegas. Don’t bother with the high-end properties, unless you want to fork over some serious cash. Some of the older properties on the Strip (think Stardust) are having a tough time competing with the Venetians etc, and are probably willing to cut you a deal. Of course, even more willing to negotiate would be the lower end properties like New Frontier, Riviera, Westward Ho.
I would expect them to have some package deals that would be pretty inexpensive in return for some promotion on your part.
Let us know what you find.