I'd like there to be three territories, how they're connected I have no preference, only that it is as natural as you can get it.

Territory 1
This one is to be a salt water marsh- something like the image at the top, tall grasses mostly, an occasional bush, steep banks. Somewhere, a collection of dens (The camp) maybe just ditches or hollows in roots along a bank. Maybe a few more in random parts of the territory.
Territory 2
This one is mostly in the cliffs by a beach or something- think California. The dens can just be dips in the rock, rather exposed to the elements, or in little canyons, this one is mostly up to the creator.

Territory 3
This third one is whatever you need to smooth the way between the other two, throwing in another camp- and hopefully keeping within the land-forms found in California. You can look here
http://cpawz.daportfolio.com/ for images, all of which are located in the san diego area. ^^