I have seen a broken skinny shaft walnut Tremolo paddle at Caleb's. Due to a hidden defect in the wood he claims
Yup, even straight and sound looking wood grain may hold defects hidden from sight.
I think some of that it is attributable to the vagaries of wood from one paddle to another, even without obvious run outs or other suspect areas in the grain. I have cracked a couple of laminated wood blades across areas that looked sound and well grained.
I have only broken the shaft on one paddle, circa 1972. Paddling some Pine Barrens stream with a youth group I was handed a decrepit Feather Brand that had seen many years worth of gunwale pries, to the point that the shaft was deeply gouged. It snapped 20 minutes into the trip with only minor exuberance.
We did not have a spare. Grumman 17s on some very narrow, extremely serpentine Pine Barrens stream. That was two early lessons learned; bring a spare, and bring my own paddles.
I have heard, perhaps apocryphally, that a nick or ding on a carbon shaft can lead to catastrophic failure. To that end I store our carbon paddles (eh, our wood sticks as well) in drawstring gun socks while travelling. $6 apiece of a couple paddle socks is cheap insurance.
https://www.budsgunshop.com/catalog...18494_gun_sock_cotton_treated_wsilicone_green
On family trips those sock sleeved paddles, 4 doubles & four singles, eight sticks in eight socks at a minimum, all go in a padded ski bag (double ski carry bag, room for 4 sails as well)
The ski bag adds cushion, and help protect the ferrules on double blades. As much as anything is much easy to grab all 8+ paddles at once when packing gear and loading or unloading the van.
Come springtime ski and snowboard bags will be on clearance everywhere, especially if you don’t mind some hideous floral print design that didn’t sell last winter. Those garish rejects do make it easy to quickly identify and extract all of a group’s paddles from a shuttle trailer; some trailer materials, like the metal grating, are akin to a wood rasp on a naked paddle.
I can repair or refurbish most paddles. I’d rather not have to.