Thanks, relache, your answer led me to here, https://hubpages.com/community/Learning-Center-Mod... which answered some of my questions.
I'm looking for something a bit more nuanced, though. Provided both a web site and hub are my own work, do you or others find it necessary to entirely re-write, from scratch, with a different structure, in order to follow HubPages's rules?
I can think of a times when someone might want to publish, say, a short intro essay on a Hub and have people go to one's site for a more in-depth treatment of an issue.
Or I might want to publish one short poem on a Hub and a collection including that poem elsewhere.