Line an 8x8-inch pan with aluminum foil; set aside.
In a large saucepan over medium heat, combine the sugar, evaporated milk, butter and salt; bring to a boil, then stir in the marshmallow creme; cook and stir for 5 minutes.
Remove from heat, and stir in the chocolate chips. Then stir in the nuts and vanilla. Pour into the prepared pan; chill in the refrigerator for a minimum of 2 hours, or until firm.
Notes
To toast pecans: Put nuts in a dry pan and cook over medium-low heat for up to 5 minutes tops. Shake the pan periodically so that they toast evenly.