This entire site actually uses the "always off canvas" method. However on this page, you can doing several things to activate the menu. You can either:
This is a great method to design around and has recently been gaining lots of popularity. The menu always sits off canvas - no matter what your screen size. This lets you push the limits with your design. The only caveat is that a lot of users might not know how to navigate the site if they aren't familiar with what to do! So make sure that whatever icon or wording you use - it's easy to understand.
The other negative feedback I have heard about this is that some users think that constantly having to open and close the menu could be a pain in the rear. Hmm.
.example-header { width: 100%; position: relative; background-color: #f4f4f4; height: 100px; z-index: inherit; }
.e-logo { line-height:100px; }
.goingright { display: none; }
.nav-collapsed .goingleft { display: none; }
.nav-collapsed .goingright { display: inline; }