Sandy, I would suggest that whatever you plant there, try to use mostly exeric (drought Tolerant) plants. Unless you like dragging the garden hose out there. Russian Sage as mentioned by Debra is a good one. You could set aside a couple large spots for ditch lilies to cut down on expense. As mentioned by Gerry, some grasses, Black Eyed Susan and Echinaceas. Ground covers, Agastaches, Solidago, Coreopsis, Liatris...white and pink. While Castor Bean plant make like it moist, you could throw a few out there to make a statement. I will be harvesting some CB seeds this fall if you are interested. Gallardias, Oriental poppies, perennial mums, Asters, White Clips Campanula, Penstemon Mystica, Yarrow and Monarda to name a few. I have many that I mentioned here to share if you are interested. Go as wide as you want to go. Keep them away from the side walk. I hope your taxes don't go up because of the new side walk. If you use bigger plants and shrubs it would be a lot easier. Good luck and keep us posted!
Castor Bean