I still think that before Storybrooke was created it was much more difficult to travel to the land without magic. We actually only know of four ways. The wardrobe, a bean, the silver slippers, and the curse. All the other ways, the hat, the water, the rabbit, the mirrors, the black fairy’s wand, the coconut all would have not worked until after Storybrooke existed and was magical. It is a magical land within the land without magic therefore the regular portals all work now.