Marc,
I know you will love it all and I will pray that ou do NOT have 90 temps that we had in 2001! First day, did 2 tours, including canal, soaking wet, from the heat.. Next day, I did all day tour by myself, including Hermitage, Peterhof, etc., etc. and was really dragging back onto the ship. No AC except buses, minimal. But I wouldn't have missed it - fabulous sights!
