So I know it's a long shot...really long shot. But if you will be in Pompeii April 28th and are looking for a tour to go with I would love to emphasize Context tours. It is led by an archeologist and is 220 euros (i know expensive, but top notch!)
I say this because I am signed up for the group tour that day but no one else is, hence it may not happen :-(.
Just thought I'd throw it out there and cross my fingers.