I also have one $4 RR left for my next trip! When I heard that the Dove Register Reward was rolling (as in, you can use it to buy more Dove and still get RR- something that normally doesn't happen at Walgreens) today, I knew we had to head out for this deal. The first transaction cost me $4.34 ($4 plus tax), and after the $4 RR printed I used it to buy another bottle. It took me a little while today to realize I also had $1.50 coupons for the daily treatment conditioners, at which point we used those too (and bought snicker's eggs and pringles as fillers). Note: As of midnight last night, this deal is no longer rolling. You'll still get the $4 RR back, but using it on another bottle will not produce a second RR.
I also lucked out and found some Foster Farms turkey sandwich meat marked down to $0.99 at QFC with $1 peelies attached- so that was free too. It'll be nice for the husband's lunches this week.