In his “Naples & the Amalfi Coast” (2018), Rick Steves recommends Pina Esposito as a tour guide various sites in the region. I highly endorse Rick’s recommendation.
My partner and I hired Pina for a 4 hour tour of Pompeii. It was totally worth it. We saw way more and learned so much more than had we toured the large site on our own. With a PhD in the relevant disciplines, Pena had a tremendous depth of knowledge yet was able to communicate it in a way that was not overwhelming and with a bit of humor. Her command of the English language is excellent. She explained the cultural influences on Pompeii, gave a good sense of daily life, and the context of Pompeii in the region over time. She also offered insight into the archeological methods.
I arranged our tour via email before I left for Italy. Pina was responsive and presented several options. We met her at the entrance and her fee does not include entrance ticket.
We thought the 4 hour tour was the right amount of time as it left time, after a lunch break, to see other parts of the site on our own, including some areas Pina suggested.