Actually, I put links to the sitemap on the handicapped-accessible nav section of every top-level page in my sites, and have never had any difficulties with the sites' indexing. If you're concerned about it, the easiest way to keep 'bots off the sitemap.html page is to have these lines in your robots.txt file:
That keeps you from having to make any mods to your actual site pages.
You don't want to be putting a 'Disallow' for sitemap.html in your robots.txt file.
What you should be adding to the robots.txt file is this line at the end, it is the path to the .xml file:-
The major search now recognise this line and is helpful if you have not submitted your map to Google Webmaster Tools or othe SE's/