I use Dreamweaver too. If you don’t want to work in code view install XAMP and install WordPress locally, then setup the testing server in Dreamweaver.
Or if you’re working on the CSS, just copy the content when you look at the source of the generated code in your browser and copy it into a new file in Dreamweaver. Then you can change the style.css file and see what it does to the page. (you will have to edit the stylesheet link at the top of your temp file)
Running a test server or blog/site, even if it’s online, on a sub domain or something, is the best solution. You can configure Dreamweaver to auto-upload files on save.