As a former surgery resident there who was/still is good friends with those who trained in anesthesia there, I can echo what optimus prime and loveumms said.
It is a busy program and while in the "old days" I wouldn't have been suprised if the residents worked long hours (because the surgical program wasn't the best at limiting work hours, try as they might), I would not call it malignant in any fashion.
The residents were a friendly, down to earth great crew. Same for nearly all of the attendings. They all claimed to be happy and got a good education. I am sure there are some who are not happy; that will happen anywhere. But unless there has been a significant change or my friends aren't being honest, I suspect that you talked to some bad apples.
Good mix of cases and as noted, a lot of Peds - its the only Level 1/Children's Hospital between Philly and Pittsburgh. Pediatric Surgery had the most add on cases of any surgical specialty (lots of swallowed FB). CTS is not as heavy as it used to be, but still decent. No burns.
Hershey? I consider myself a big city lover but honestly in residency, the last thing you want is a busy long commute, expensive rent, loud neighbors, dangerous streets. There is plenty to do in the area, lots of natural beauty and Philly, DC and Baltimore are well within driving distance. I loved leaving the hospital after dark and not worrying about a) whether my car would still be in the lot and intact; and b) whether I was safe to walk to my car alone. And as optimus notes, this is a more upscale area and you aren't taking care of crack ******, prisoners (rarely) and other ingrates. The Amish population also makes for some interesting genetic surgical diseases due to the consanguineity and they are very gracious. Call me a snob but I don't think I missed out on anything (then again I am practicing in an upscale area as well).
Its not for everyone, but I always found that there are people who are unhappy regardless of where they go. I thought Hershey was a great place to do residency.