My husband is a fan Yuengling also and I know you can get it at 50's PT & Sci-Fi Dine-In, that is if they haven't changed the menu since we've been there.
Oh Yes....Good Ol' Yang as we used to call it in high school. I grew up in Tamaqua about 15 miles from Pottsville. When i go back to visit my DSis I'll have to take the tour. I saw they were trickling down South over the last couple of years. DH loves the Black & Tan. He'll be glad to see it at WDW.
You can get it at every single bar that I have been to in WDW (and I have been to alot)!! It is such a good beer and I am so glad that it is so easily accessible!!