Don't know about the Crowne Plaza. I would suggest trying Antica Locanda Montin. Note - I have not stayed there but I have eaten there. The food is fabulous and the people were very friendly. It is also accesible by private water taxi or vaporetto (the vaporetto would require a short/easy 5 minute walk). If your ship is leaving from the San Basilio pier, you are just a short 5 minute walk away. If your ship is leaving from Marittima basin, it is a challenging 30 minute walk or a short cab ride or water taxi.