I had a gas smell in my 2006 base roadster. The end of my fuel pump where the electrical connectors are was weeping gas, no drips just damp.
Here's the post I did when I replaced mine. If you go through the pictures, you'll see one that shows the location of all of the components, including the Evap Cannister.
LINK to Fuel pump, filter, etc...
Hopefully this will be helpful.