Hi Linda
I have recently returned home from the Sorrento trip on 18/05/11. We only had a half day at Pompeii but had a local guide to take us round. Two members of the group made their own way to Pompeii by train from Sorrento, so that is possible if you want to spend more time there. It's a great tour and I didn't find it tooo hectic.
(Edited to add). We had meals in hotel for five nights, the other two nights the whole group went to local restaurants for meals, including wine and coffee (one cost 23 euros, the other 30).
James