Over on the cottage gardening forum Chelle has pictures of her beautiful gardens. She has a hill for garden space too, it is amazing!! You might get some ideas there. I'm sorry I'm not much for groundcovers because I'm afraid they will get out of hand in my yard. I hope someone will chime in. You may want to post this over there or on the perennial forum.
http://garden.org/ideas/view/S... Sorry wrong person it is huggergirl that gardens on a big hill.