so, is it full shade or part shade? possibilities might include arborvitae, juniper, yew. I'm worried aobut damage to the oak if you're going to be planting among its roots, I've heard they don't tolerate that as well as some trees do...

SULIS plant selection database: http://www.sustland.umn.edu/plant/index.html

Pauline,

Try Russian cypress, 'Microbiota decussata'. It is a low-growing shrub (about 1' high). It spreads to 3-5'. I've had two for about 10 years. Mine get a little afternoon sun, but they can take pretty heavy shade. I've had to cut one back because it spread out into the path too far.
Virginia

leaveswave-Thank you for reminding me about the oak. I will stop planning this I will have to figure out another way to stop the sledding. I know I can't plant where the oaks roots are. Thank you again. I would have gotten it all planned out and then remembered.

I wouldn't worry about the oak to much. The amount of root damage you will cause will be minimal compared to the total root system(even on that side of the tree), as long as you don't cut any large roots. Assuming also you are planting individually, and not preparing an entire bed. The extra watering you will be doing the first year should mitigate the disturbance too. I would bet that the oak has roots in the neighbor's yard too - across the street!