I'm no expert, but I believe what they were telling you was key - "just bounce it off the bottom ".  Walleyes tend to feed pretty close to the bottom most of the time.  Maintain contact with the bottom or a few inches above to catch walleyes.  You may need to use a heavier jig or anchor if you are drifting too fast to maintain contact with the bottom.  You should be able to feel this with your rod/line.  Walleye's also often hit your jig as it is falling so don't let out much slack when jigging and be ready to set the hook.