I have created some pages in skuid that serve as layers between a homepage and record detail pages on custom objects. To test these pages before deployment I have simply been using an href link to the address that appears on the preview page in the sandbox.
I believe that if, while editing a page, if you click preview it will open the page in a new window and that URL is the URL of the page that you can use to access it directly without relying on button overrides.