Yeah--a canoe!

: Does anybody have any ideas on designing a deck for a stich and glue kayak
: that can accomodate me and my 80lb dog. Im trying to stay away from a 20
: ft double and simply redisign something that already exists.

Seriously. I'm a die-hard kayaker, but large dogs are not really compatible with kayaks. I've tried it, but it's really not easy. Unless your dog will lie down on the floor of the kayak and go to sleep (which I doubt--mine won't!) then they will be standing up, shifting their weight from side-to-side to see all the wildlife and waterfowl around you. It's not fun. (And my dogs are only 55 lbs. each)

In a canoe, on the other hand, there is enough beam to cope with the weight of your dog moving around, and you can really enjoy the paddle trip with your 4-legged buddy. I don't like having even one dog on a kayak, but two dogs in a canoe is no problem.

Shawn

The hard way:
http://www.geocities.com/shawnkayak/trips/shawnshado2.jpg

The easy way: