OK quick search yielded that the seeds are toxic and also needs up to 3 mo cold stratification to grow if they had been dried on the shrub, so I went out and poked some in a couple of small containers that had tomatoes in them (just yanked out the dead sticks - nothing fancy) and left them near the downspout where hopefully they won't dry out. Also tossed a few seeds where it would be OK for them to volunteer if they do, and put one of the little containers in the garage with the dormant overwintering plants.
Next year, I'll try harvesting some twigs and bark -- supposed to be similar to cinnamon when dried and ground. "small amount of camphor" in the bark according to PFAF which explains the eucalyptus-like fragrance.
I kept the pods -- I think I'll break them up and use them in potpourri in case toxic compounds are concentrated in the pod (no mention of the pods so far in my search). ...Changed my mind and made a single-ingredient anti-clothes moth sachet for now -- seemed like a good idea with the camphor content and I'll be able to divide it out if I wanted to later.
Now I have 10 seeds left. What to do.... I really should put more effort into learning to/experimenting with propagating trees and shrubs, but I'm not sure if I'm up to it right now. I collected several Tulip tree cones last year without doing anything, and this year, I have a little collection of Halesia/silver bell seed pods that are maybe too late to plant. Tree seeds usually need to be planted right away