Hi Michelle, I realize this post is dated and you’ve likely found a solution. But for those who may not have found a solution, I post this answer: If you want to suppress the header by page or post and not for your entire site, simply add the following CSS code to the page/post in question (there are WP plugins that will allow one to add CSS by the page):
.site-header {
display: none;
}
Note – this will also remove the nav/menu bar! So you may have to play around with how you would set your page up (you could always add navigation to the page sidebar).
Hope this helps!
Susan