Hi Maggie.
That does look like oregon grape to me, from the photos. (Mahonia aquifolium) - not to be confused with vine grapes for eating/wine making. This seems like a good description of the plant and uses:
http://wildfoodsandmedicines.com/oregon-grape/
Onto your original question - the best way to know what will do well in your area is to get out there and explore! Learn the forest types of your region, and see what edibles and medicinal plants already thrive there. Then you can add in others. Nature, and our local ecosystems, are the best teacher.
Of course, I also have to mention mushooms again. Getting started with some inoculated logs equals a good, nutritious yield from your woods - and you can feel compelled do to some thinning of trees in a way the benefits the residual stand.
cheers
Steve