I recently needed to decommission a Wordpress site but wanted to keep an offline static version of it.
Since it was Wordpress, I thought I’d use a plugin to create the static site for me. However, after trying two and failing each time, I went back to a trusted command line tool: wget
The following command worked for me:
wget --mirror --convert-links --adjust-extension --page-requisites --no-parent -e robots=off http://site.com
Might come in handy for you, too.