Manual rel=next

I am fighting Panda, and have several pages in an online encyclopedia with high bounce rates but decent dwell time. I can’t get a clear read on how important bounce rate is to Panda, but I figure better safe than sorry. So, I am going to try to split some of my more lenghty entries into multiple pages. I want to add the rel=next to these multi-page articles manually. I know I can do this with canonical, but not sure with the pagination. If this plugin can’t do it, is there any easy way to do it? I’m thinking about using custom fields/ and some conditional php to put it in the header, but seems unwieldy to add that load for all my pages when I only need it for a few.
Thanks in advance for the help.
Jeff

http://wordpress.org/plugins/wordpress-seo/