Learn to love PHP. For your destination URL, use something like this: example.com/mylandingpage.php?kw=my+many+word+keyphrase+here Then, on the landing page, include this code: <?php echo $_GET['kw']; ?> Put it in the meta tags and then two more times in the body, once in H1 tags for good measure. This will display the *exact* keyphrase in your landing page, automagically.
This worked like a charm. Thanks!