Grapes can be propagated using hardwood cuttings, layering, or grafting, but for your purposes hardwood cuttings are probably the most practical. Cut pencil thick cuttings about 9" to 12"long from growth made to previous summer. These can be taken in the late fall or up to late March before the stems start into growth. I like to make the top cut at an angle just above the top bud and the bottom one horizontal just below the bottom bud, so you can tell easily which end goes up. Bury the stems in a 3" to 4" deep slit trench and cover them with soil and then straw or some insulating material for protection from the worst winter weather. When the weather breaks in spring, dig up the cuttings and line them out 6" apart in rows about 6" deep, so that the top bud is showing. It is important that the horizontal cut be at the bottom and the slanted on at the top. This above ground bud will develop into a shoot during the growing season. Don't expect that every cutting will root, but about 50% of them should do so and be ready for transplanting by the following spring.