Macungie looks to be about 2 hrs from me.
For anyone around DE, there is usually a Cruise Night every Saturday. The schedule "used" to be:
first Sat: Pike Creek Shopping Center, Newark/Wilmington DE
2nd Sat: shopping center in Stanton, DE
3rd Sat: Fox Run Shopping Ctr., Bear, DE (they just had this last weekend, actually)
4th Sat: I think it goes back to Pike Creek but not sure
Hope this helps someone!