A system and associated instruments for locating, and accurately and controllably delivering, a device to an area sufficiently near a bone defect using anatomical landmarks is provided. The instruments allow the surgeon to navigate to the area around the bone defect quickly and easily, while also facilitating proper insertion of the device. In some embodiments, the defect is located on a femur. Guide instruments (20) having a plurality of device portals (24) are also provided for use as standalone instruments or as accessories to the system. In addition, a protective guide sleeve is provided for the insertion of small diameter devices.