Solved
Setting Field Value on Form with JS
I am trying to pre-populate a field on an embedded form. I read through this article and it seemed straightforward.
The issues I ran into was the page did not show the ID, just the name:

This is the code I am using:
<script language="Javascript" src="/js/public/jquery-latest.min.js" type="text/javascript"></script>
<script type="text/javascript">
// use no conflict mode for jQuery
var $jQ = jQuery.noConflict();
// when the page is ready, change sFDCCampaignID and newValue
$jQ(document).ready(function() {
$jQ('#sFDCCampaignID').attr('value','701VU00000AElPWYA1');
});
</script>