I’ve never seen a zombie movie where the zombie can swim, so I’ll take my SKS and the couple tins of bulk ammo I have stored. That should be enough to hold them off while I hitch up the boat and get it in the water. Then off to a boat only accessible island, set up the tent, and fish/hunt for food.
If I have time, grab my generator and Dish so I can watch zombie sabres vs zombie leafs.