Here are the ones I would suggest:
American Hershey's White Chocolate Cream Hugs: 340g (12oz) Bags
These are awesome in my opinion.
American Hershey's Snack Size Chocolate Assortment: 30 Bar Pack
Don't choose one candy bar, sample them all and choose your fav next time.
Jelly bellys would be awesome if you don't have them there. Jelly beans that taste like pina colada, chocolate, the only flavor that sucks is popcorn, since it tastes like buttered popcorn lmao. Here is some flavor info for the diff types.
http://www.jellybelly.com/fun_stuff/flavor_guides.aspx
The mars candy bars, m&ms, skittles are all good as well.
Personally I would go with the hugs for chocolate and jellybellys for fruity but the other ones I listed are great, as well as some others I didn't mention.
Best of luck