Not all grapes are hardy in N. Idaho, but these should do well here. All are seedless, except Concord.  One of the challenges with grapes is to get them ripe before late frosts, but these varieties should be fine. Grapes need some time to establish deep roots, about 2 or 3 years, before they really start producing.  They are easy to grow and with a little effort you will be rewarded with large crops of fruit, perfect for jams and fresh eating. A mature vine may produce 15-20 pounds of grapes/year.  These vines also have desirable ornamental value and are an ideal natural privacy screen. Put them on an arbor, trellis or fence, but don't forget that deer also enjoy them.  I recommend you research the web for pruning advice that works with your design situation. They tend to bear on the first few buds from last year's growth, but some research will be best. Deep feeding is best if you have poor soil.

Tips for Planting Grapes

Dig a big hole for your vine, making sure you incorporate plenty of compost/manure and fertilizer down deep under the roots.  

Best fertilizer would be organic all purpose with a high middle number.  Fill soil back in and water deeply to settle. After that, water deeply but infrequently to encourage deep roots. It's a good idea to mulch your plant, especially the first winter.