You might want to include some kind of a wind-breaker with the clothes as well since even a light wind can have a chilling effect if you are slightly damp.
I would also suggest a minor first aid kit. Several times my kit even saved trips from cancellation due to cuts and scrapes incurred while unloading kayaks and getting them down to the water. Mine has a few waterproof bandaids, some guaze pads, adhesive tape, some anti-biotic cream, and some ibuprofen. No fun paddling with blood dripping from a hand or knee or with a pounding headache.
Good luck and stay safe.
The Kayak Wing
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