I just made up a recipe and brewed it. I call it the Pottsville Pale Ale. I'll let you know how it turns out and if it's anything close to Yeungling. They use Cluster and Cascade hops in Premium and Lager. I figure they're around 20 IBU's. I live near Pottsville so I get to sample a lot of the real thing. Since I'm still an extract brewer I didn't use any adjuncts. I understand they use a lot of corn.
steep @ 155F for 30 min in 2 gallons
5 gallon boil volume
.5 oz Cluster 60min
.5 oz Cascade 30min
.5 oz Cascade 5min