As always the only answer is: it depends. If you are the only peron touching the code, you can do anything you're comfortable with, including taking shortcuts.
One of the benefits of using setters is that checks need to be performed at only one location in your code.
You might want to pay some closer attention to what is actually being get and set by these methods. If you're using them to provide access to constant values you are probably better off by using constants.