we will traveling from Rome to Herculaneum and Pompeii. All our luggage will not be concealed. Are there lockers in these areas or any suggestions?
Thanks Mary

Maybe it's just me, but I'm not really sure what you are asking. Are you asking if there will be luggage storage on the train or at the station(s)? I'm sorry but maybe you could clarify a little better.

Yes, I wasn't clear. We will be driving and we don,t want the luggage stolen!! We need to put it somewhere. Thanks

I can't speak to Herculaneum and Pompeii specifically, but it certainly isn't normal for tourist sites in Europe (or anywhere I can think of) to have places where you can store your luggage. Perhaps there might be lockers at nearby train stations, but those have tended to disappear in recent years in Europe because of terrorist threats.
Your best bet is to figure out how to arrange your packing so that everything IS concealed. Another reason to pack light

Alternatively,

There is checked luggage at the Pompeii Scavi entrance.