A good idea for any yakker that hasn't done so yet and should while the water is still warm enough. You should go out in your yak and purposely flip it over (make sure someone is with you to assist if need be) and see if you can flip it back over and if you can get back on it without assistance. The time to " practice" isn't a real life situation.
Here is a quote I stand by when it comes to kayak fishing " dress to swim and rig to flip" because sooner or later it is going to happen- better to be prepared.
One final thought- a person can get hypothermia in the middle of summer in 70 degree water- You loose your body heat 25% faster in water than in the air- so reducing your time IN the water will greatly reduce your risk.
Always wear your PFD.
Be careful out there as we head into the fall months.