Brendan,
I do not know your level of capabilities so if this sounds too elementary to you just grin and brush it off...I am only thinking about your welfare as a fellow waterfowler and hopes to read and see pictures of many successful hunts........
I have hunted out of a Pygmy Coho, company out of Washington State, that I built about 7 years ago on the Maumee River and several of the lakes north of Warsaw when I lived in Fort Wayne...The boat was mainly used for transportation to and from the area that I was hunting but have had some occassions where I draped the boat with canvas drop covers used by painters that I dyed myself in five gallon buckets...It is near 18 feet...I could stuff up to a two dozen birds in the front and rear hatch areas...A smaller boat would be just as efficient but lose some sea worthiness in big waters...
My only recommendations of hunting out of the kayak is that you get a spray skirt during your treks, stow everything below, and store a dry bag with at least all upper clothing...
The number one thing I would remember in wanting to hunt out of the kayak is know your limitations in the boat...Kayaks have extreme sea worthiness capabilities dependent on length...Learn the boat...Learn the boat...Learn the boat...Buy a "SPRAY SKIRT"...Learn the boat...Practice in the boat in warm water with the same things you would fill the boat while hunting...Yes, it might seem and look funny to bystanders...But it doesn't look funny when those same bystanders read about you in the paper because you didn't know your limitations in the boat...It might seem elementary but a key thing you need to teach yourself or learn through a class is how to roll...Once you get the rolling down...Now learn to roll with all your stuff you will be hunting with in the boat...It changes believe me...Trekking the Quetico, Lake Michigan from Bear Sands Dunes to the Manitou Islands and other trips in which I have had to save myself in a roll situation stowed with 80 lbs of extra gear changes the effort and style of roll you may need...If you think you will not flip...Think again, shift your paradigm...Your not practicing the method just for fun but to qualify your prepardness on the just in-case moments that do happen to us all while hunting...
Go for it...It will open up many opportunties...But please practice the paddling and manuevering in the boat...Flip yourself on purpose...Learn to roll...Once you have learned to row your capabilities of saving your ass increased ten fold of being at least to paddle to shore instead of swimming to light a fire...
Regards,
Kristan