I finally found this tea kiosk on my last trip a few weeks ago. I also had the frozen chai and it was absolutely outstanding. It was creamy and almost had a hint of cinammon. I am an avid fresh tea drinker and loved it. I will make a point of visiting this stand every trip from hereon. No, they do not accept the dining plans as of right now.
If you do not want a floral or "plain" tasting tea, stay away from silver needle. Although it is extremely high in antioxidants, it does not have much of a flavor to it. Any of the rooibus teas would be good. I remember them having a rooibus vanilla which has a nice taste. Still, I always recommend the frozen chai. It really is incredible.