Look
here for the map of Stazione Marittima, the Venice cruise terminal.
To see the city of venice please click
here.
On the left hand side there ist the cruise terminal. From there to Piazzale Roma you can go ba shuttlebus in a few minutes. Than take the vaporetto Line 1 for the Canal Grande tour.
I woul drecommend you a hotel near the S. Luca railway station. But the Mercando di Venecia has only a few rooms.
How many rookms do you need? How much would you pay for?
Regards
Uwe