So, I'm going to propose to my girlfriend, and was thinking of asking at a natural rock amphitheater we both love, which involves a couple hour drive. However, she suffers from serious migraines that can be exacerbated by being in the car for long periods. I was wondering if there's anything preventative I can do for her in the days prior, and for the drive, so that she doesn't have to deal with a migraine or have one prevent the occasion. It's a setting I know she would like, but I'd rather figure something else out if it's not feasible. I figured it would be good to ask here for advice first though.