PROGRESS!!!
After way too much thought, interruptions, and general stalling out, I got some uninterrupted shop time today and milled the staves.
After deciding to use what I had on hand, rather than spend more money and have an overall accumulation in the shop, I landed on some really old cherry, some of which has been kicking around out there for over 25 years.
I only ended up using the 11' board and part of the shorter board.
Cut to rough length:
Ripped on the table saw to just strong of 1-7/8" wide, matching the original staves:
Trimmed to final length - 16", again matching the original. I considered adding a couple inches overall length, but decided this is plenty of capacity, which honestly is likely more than I'll ever use.
The original staves were tapered about 1/8" each side back-to-front. I wanted to match that, and the easiest way seemed to be a 15 degree chamfer bit (from MLCS).
The edges were cut on a horizontal router table. Worked a treat.
There's a flat to each edge because 15 degrees wasn't quite steep enough, and routing the entire thickness would have resulted in too much material being taken off.
The table saw left a pretty sharp edge, which seemed like a hazard. Broke the edges with a 45 degree chamfer bit. Total router table work was 16 cuts per piece.
Finished pieces:
I ended up with 23, need 22. A spare seemed like it was worth it.
Now that I know the final thickness of the pieces I can order my hardware. Once I get it I'll set up a jig on the drill press and drill the holes for the screws. In the meantime I'll figure out a finish for the wood. Any luck I'll be using this yet this year.
Feels good to get off dead zero with this project.