http://www.vegasmeansbusiness.com/pl...tion-calendar/
Take next week:
Furniture Mart: 50000 Jan 18-22
SHOT: 67000 Jan 20-23
Kitchen and Bath: 24000 Jan 20-22 (probably some overlap with Furniture)
Builders: 49000 Jan 20-22 (overlap with Furniture/Kitchen)
Adult Entertainment Expo: 25000 Jan 21-24
Surfaces: 25000 Jan 21-23 (overlap with Furniture/Kitchen/Builder)
If you figure that there's ~150,000 rooms in the area, if there's enough weekday business to take a huge chunk of rooms, you can expect the weekday rates to go up.
Weekend rates go out of control when there's a big event. Super Bowl? not that much. NASCAR, first weekend of March Madness, May (Mayweather fight, Rock in Rio for 2 weekends), EDC: gonna get nuts.