I was thinking naps would work fine for a couple days, but after 3 or 4 days, you need a real night's rest. Not only for your body, but for your mind. It is bad for your cognitive functions to not have several hours of deep sleep each night. I honestly think this is when a lot of medium distance sailors get into trouble - they push through a few days and feel OK, but haven't realized the lack of real deep sleep is impacting their decision making and reaction times.

Can you securely lay flat on your kayak while underway, to get more than a few minutes sleep?

...asked if I had a landing net (I did) ...

Check out Goss Outdoors on Etsy. Several friends and I use his Model 2 bearing replacement and I haven’t had much trouble from it for years. Before this mod, I had multiple spline failures and bearing fractures resulting in a lot of noise and then failure. Easy 5 minute fix and works great. I do not receive anything from Goss Outdoors for this, just another satisfied user! https://www.etsy.com/shop/GossOutdoors

Welcome     Any chance you will offer kayak service/repair?  I've got a Hobie in need of a rudder line repair.