To see the phenomenon in anything than a very feeble form you need to go further north than anywhere in Scotland. Those who have seen the lights in places like northern Norway, Iceland, northern Canada, Alaska, etc. will testify that at their best they are a truly jaw-dropping and utterly unforgettable sight. I urge you to either overcome your opposition to flying (e,g, Iceland is a little longer flight from Glasgow than it is from there to London) or else make a long journey by surface means.