Well, give it a try but we were taught not to leave the hulls on long to get the husk/hull off because they will mold. This is what the nutgrowers org says ‘If black walnuts are left in the hull/husk (the softer, green to brown outer shell) they will mold. The hull needs to be removed. If you leave them in the hull too long after they fall off of the tree, they will transfer color and flavor to the nut meat. You need to remove the hulls as soon as possible. ‘ This from Iowa State: ‘ The nuts should be hulled immediately after they have been harvested. If the hulls are allowed to remain on for any length of time, the juice in the hull will discolor the nut meats and make them strong tasting. The stain also discolors skin, clothing,concrete, and anything else that it touches. There are various ways and devices to hull walnuts — a cement mixer, corn sheller,automobile wheel, and squirrel cage are possibilities. Hulls can also be removed by stomping the nuts under foot or pounding with a hammer. After hulling, thoroughly wash the nuts to remove hull debris and juices. Small quantities can be washed in a large bucket or tub. At this time, the good nuts can be sorted from the bad ones. Unfilled nuts float while filled nuts sink. (Rubber gloves should be worn when hulling and cleaning to prevent staining of the hands.)’ After washing and sorting, allow the nuts to dry for two or three weeks. An excellent way to dry nuts is on a wire screen. Spread the nuts in shallow layers (no more than three nuts deep)and dry them in a cool, dry, well-ventilated area. A shed or garage is usually a good place to dry walnuts.’
My grandfather would never let us waste even a day (although we tried ) after we collected them to start husking em. Can still hear the lecture abt it.
But, maybe if you keep an eye on them as they dry in the hull it’d be ok – don’t know as wasn’t taught that way. Just to let you know.