I'd be tempted to use that bike ONLY on the trainer. No last minute grabbing it as a spare commuter.
My basic plan is to set it up with flat bars, probably no brakes, rear derailleur, rear downtube friction shifter, spd pedals, basic computer on the rear wheel, and comfy saddle. It will go on a Kurt Kinetic Road Machine fluid trainer. I just don’t want to submit my other bikes to the wear and tear to the drivetrains on a trainer. I’ll keep mulling this over. Thanks for the suggestions.