I used epoxy.

Dan

I have added outside stems successfully both ways, most recently with epoxy. The beauty of thickened epoxy is it will fill any gaps and assure a complete bond, downside is it it is messy. If you can get good, consistent contact without gaps and can clamp it down evenly, Titebond III will do fine. Contrary to the advise of others about using 'glue', I coat both surfaces throughly with a thin film of Titebond III, wait a minute or two & then clamp it as tight as possible. Then, use clean water on a rag or something to clean up/finish the exposed edges. Works for laminating paddles as well.

Lew 

I didn't mention that my outer stems are going on my Night Heron just after I have closed up the hull, and nothing else has been done (i.e., no sanding, no deck, etc.). I thought it was at this stage that I could add the outer stems, contrary to Nick's video, where he adds the stem at the end after the deck and the hull have been joined.

The books are great, but experience from others can yield valuable insights to help to read between the lines of what is understood but not mentioned.

Thanks in advance again,

Chris F