When I spoke to Hersheys they stated the regular size are gluten free. (I have eaten my share to be sure that they are fine ) I know the other sizes they can't guarentee as they do not have a dedicated line and other things might be made on the line that aren't safe. The same with their milk chocolate bar...other sizes may not be okay due CC issues.
I bake both gluten and non-gluten items in my oven (in pans) with out any issues. I can see where cooking on the rack can cause an issue, but if it's in the pans, I can't see where it should be a problem. (Please, correct me if I am wrong..all you more experience ones!) some people are very sensitive and have reactions over very small amounts of gluten...
Nope, don't go for the Reeses Pieces But peanut butter and peanut M&Ms are fine. Anything but the pretzel ( self explanatory ) Reeses peanut butter cups are good, too. Hershey's plain and almond, regular size bars, too! (Guess you can tell which wagon I ride on )
I have found on all of the Nestle Coffee Mate non-dairy creamer, the specific phrase gluten free. (I am not informed about dairy so I dont' know if that would be safe or not.)