If you want to escape the crowds and enjoy a wonderful view in peace, you should definitively reach the island of Giudecca.
To get there you have to take the vaporetto (water bus), no bridge connects it to Venice. Since the price of vaporetto is quite high for non-residents, many tourists are discouraged and the island is mainly lived by locals, so make sure you have planned your vaporetto trips well or buy a daily ticket.
As a local I like Giudecca because I feel that it’s still real and authentic. Compared to other areas of Venice, certainly more picturesque, in Giudecca you will not find many tourist shops, but rather old people playing cards, children playing and some cats enjoying the silence.
The island is also home to one of the most important churches in Venice, the Church of Redentore which is tied to a special feast celebrated every year in July in Venice. If you happen to be there you can’t miss it!
In the island you can also find Palazzo Tre Oci that usually hosts beautiful exhibitions of photography and the Molino Stucky, a former mill, now converted into a luxury hotel with a terrace with a stunning view from the Skyline Rooftop Bar.
But Giudecca is even more, the view that it has over Venice is worth a long walk. My advice, do not forget your camera and enjoy wandering as much as you can!