You're not really circumventing Drupal; you're getting all of the overhead of Drupal with almost none of the benefit. To really circumvent Drupal, you should not put these static documents in Drupal at all. Drupal's .htaccess is set to only load Drupal when a URL does not match an actual file, so putting your actual files where they are now and adding Drupal where Drupal goes (which shouldn't overlap with .html files at all) will both work better and be easier to implement.
If you really want to dump the HTML in CCK and run a bunch of database queries before outputting static HTML, you could just change the field to plain text.