When taking softwood cuttings of deciduous plants you take tip cuttings from the ends of the branches only. That rule does not apply to hardwood cuttings of deciduous plants. For instance, a plant such as Forsythia can grow as much as four feet in one season. In that case, you can use all of the current years growth to make hardwood cuttings. You might be able to get six or eight cuttings from one branch.
Grapes are extremely vigorous.
A grape vine can grow up to ten feet or more in one season. That entire vine can be used for hardwood cuttings. Of course with grape vines, there is considerable space between the buds, so the cuttings have to be much longer than most other deciduous plants. Since hardwood cuttings must be done during the winter months, you probably will want to work in your garage or basement where it is not quite so cold. Of course there are still some nice days after the first freeze when working outside is possible.