Hershey Park or Myrtle Beach?

I am 18, and my vacation this year can either be Hershey Park in PA. or Myrtle beach...I am having trouble on deciding where to go..Ive been to the beach before and i love it...but ive never been to Hershey Park, so im not sure what to expect from it...does anyone have an idea which would be better, because i can only go to one, i would appreciate the advice, Thanks.