Paul,

Thanks for taking the time to make such a detailed response. I don't have a table saw and the wood is not shaped yet. I tried using a backsaw but didn't do a very good job of making the tongue. It ended up being crooked and didn't fit in the groove. I cut it off and may try one more time. Part of the problem is trying to measure and mark it as the edges of the cedar board are not really squared off - a little rounded. Makes it difficult to measure in from the edges to find the exact center. Most of the problem is me though.
:-)

I like the idea of the scarf joint as an alternative. Sounds potentially stronger than dowels. I'm not the greatest with mitering angles, though, so could be a challenge. Your sandpaper on the ash is a good idea.

I was looking at glues at the hardware store the other day and found Titebond II. Is it just a kind of wood glue? It says not to be used for surfaces that are going to be submerged. That doesn't sound like the right stuff.

Thanks again,

Patsy