I cannot tell you how saddened I am to say that the nursery is closed. Britanny had terrific stock, decent prices and unique stock suited for mountain seasons that are hard to find elsewhere 'down below'. Short version, inability to come to terms with the landlord.
Last year we put in several trees/shrubs to improve our fence privacy and also as a screen from the road. Ornamental trees that do well up here (all purchased from Brittany unless stated otherwise):
Size Large:
-Red Maples, ie "Autumn Blaze", "October Glory" (fast growing, 40-60' but the last many feet will still take awhile, at our age we figured we'd be in the ground with them by that time ;-)
Size Medium:
-Amur Maples, ie "Flame", "Embers" (also red, to 20' can be shaped to 12-15'). We put in several last fall, I'm looking forward to them very much.
-Ornamental Plums, you see them all over town. Spring flower show, burgandy leaves, and ours actually had small plums this year that were terrific (I called them 'plum poppers ;-) We got nice ones at Lowe's
-White Birch, also can be had at Lowe's
Size Small:
Japanese Maples. Ours are 3y/o now and doing great. But you WILL need to provide at least 80% shade as the summer sun will burn the leaves otherwise.
Other colorful shrubs if you're looking at fence privacy and can be groomed to height:
-Viburnum species
-V. trilobum, "Cranberry bush" 8-10'. White pompoms of flowers in spring, bright red berries the birds love that you can make into preserves, tart like a cranberry. Tri-lobed leaves like a maple and in autumn the leaves turn red. Deciduous
-Photinia, broadleafed evergreen shrub. Similar flowering/fruiting habit to Vibernum.
-Lilac. If your lot is like most everyone else's you've probably also inherited some of these. Enjoy!
If you're looking for anything else that grows well up here, I've had great luck with my roses, and many perennials do well up here, too.