Private tour guide recommendations Pompeii half day from Sorrento?

Hi All,
We are two couples getting off a cruise ship in Naples, June 4, 2026, and transferring to Sorrento for the night. We are looking for a private or very small (6-10max) group guide (ideally with Archeologic background) for a morning, 3+ hour or more tour of Pompeii and would love some personal recommendations. We are in our 60s and reasonably fit as far as the walking on uneven ground, etc. The idea is to book it for the 5th and can get ourselves to Pompeii, not adverse to starting in Sorrento depending on the difference in price. I would prefer to keep the cost under 700 Euro, and appreciate your input. Ciao