Sitka or Petersburg Alaska would be the perfect retirement communities. Not so isolated that you can't get out if you wanted to but isolated enough that you don't have to worry about the zombies showin' up at your door. And the scenic and natural beauty is beyond compare. Very mild winters due to the maritime climates.
My wife keeps looking at the TV program "buying Alaska". The winter snows and temps are the only thing keeping her from wanting to move there permanently. I could care less. Trapping, hunting and fishing would be incredible.