Reno couponomy is not good
What are the best Reno coupons and where can they be found?
There is not much else in addition to the few you mentioned. Peppermill has a promotion where once daily you can slide your player card through a machine and get various "prizes" -- once in awhile, a match play coupon prints out. Alamo usually has some lucky bucks available in the convenience store. Boomtown and Fitzgerald's have good free room mailers.
Compared to Las Vegas, Reno couponomy is almost non-existent. Check the Reno Gazette-Journal coupons, link below. They change frequently; sometimes some worthwhile ones appear. You need to register to get them.