I am sorry to inform you that since they completed the new manufacturing plant (big blue builing on the right when approching the area) that beautiful smell is almost gone. They still make some products in the old manufacturing building but the odor is also reduced. Yes, the odor police got on the company.
Here's a secret. When you go to Chocolate World you will smell heavy duty chocolate throughout. Before opening they put a 5 pound chocolate bar in a crock pot and blow a fan over it. Shhhhh.
That's too bad; it's been several years since I was in Hershey.