Well, if you’re going to drive there then the best solution would be to sleep before because if you’re tired and driving you have a really high chance that you’re gonna get into a crash, if you are being driven there then it doesn’t really matter, but the driver(whomever it may be) might be concerned that you look so drowsy(if you don’t sleep before, that is), causing the possibility to look at you and give you a concerned look as they’re driving, slightly increasing the chance that you may crash. Anyway, the safest possible option would be to sleep before, since the possibilities of injury are much higher if travelling drowsily.