separating the deck from the hull is pretty easy.
remove any shelves and molding (you've probably got woodgrain vinyl over thin plywood) covering the joint on the interior and you'll see there's about 100 bolts coming through from the exterior. pull the vinyl rub rail insert from the aluminum rubrail on the exterior, and you'll see the flathead bolts. get a partner and unbolt all those... after doing that i worked the joint from the exterior with a stiff putty knife and it pretty much popped loose... yours s/b pretty easy after a long soak.
other than that, all you've got holding the deck to the hull are the mast support and the cockpit drain/support pillar... good luck