Being in the hotel biz let me tell you the real trick, AARP/AAA is not a real discount, hotel only have to offer 10% off rack rates.
Call the hotel as early as possible, look on the internet, ask about specials, use the entertainment card, if you belong to any roadside service they usually have access to discount cards, and informed traveler is hard to say no to. Remember hotels rooms are a supply and demand comodity, high supply low demand = low price, high demand low supply=HIGH price. Most major chains will honor whatever rate you find on priceline or the other internet sales areas, rmember the hotel sells the rooms to priceline etc.. and they mark them up, the hotel would rather sell you the room personally and make all the $ themselves.
Always check the chains website such as hiexpress.com
Just a little info from someone in the industry.