Thanks all for the input. I will post the results when completed.
The corrugated fasteners are intruding. A few of the pre 50's travel
trailers that we have owned had screen doors held together with these. It
will add to the charm for me.
I'll take a list of the suggested woods to the lumber store to make my
decision based on availability and cost.
Regarding cottonwood: I have only used it for carving spoons and scoops many
of which we have used in our kitchen for several years with good results. I
have also turned a very nice vessel from cottonwood crotch that sits on our
mantel up at our northern Arizona cabin.