The rooms are generally quite nice, with luxury finishes and bedding for discerning guests.
You've got your standard options like 1 king bed or 2 queen-sized beds for the rooms.  Furnishings include a couch and seating area, plus a refrigerator for the food and drinks you want to bring along with you.  The room costs vary a great deal.  If you're staying during the week, you can expect to pay a room rate of $90 - $150 a night.  If you're looking to enjoy the room over a weekend night, it'll cost you a pretty penny.  Rooms are in high demand, commanding rates upwards of $400 - $500 per night.
If you're a Caesars Rewards member, and you've got a history of gaming at the casino, you can be offered discounted or even free rooms, so that's definitely worth a look.  Check out the Caesars Rewards website here to sign up.
Visit the Harrah's Cherokee website here to look for room availability and pricing.