Let me take a stab at this, J. A. , I'm 82.
On the PC, copy & paste your story into Dropbox in Windows Explorer, or drag it there from wherever it is if you wish.
On the iPad, open the Dropbox app, find your story, and copy it or "Open in..." another app. To get it into your forum, I imagine you will want to copy & paste -- I don't know how your forum works.
Be sure to allow a little time from when you add it to Dropbox before you try to retrieve it on the iPad, to allow it to synch over.
Does that help?