The thing to think about is, is this a continuing problem or just a "one-off" situation. If it doesn't happen again, no sweat. If it continues to happen, then you need to worry.
You should also consider that it could be your AirPort card, not your base station, that caused the problem. While a lot of people have no problem at all with it, some folks have a big problem with their computers waking up and not connecting wirelessly. If you have an older card, you may not have the latest software and firmware, which have both been upgraded to improve performance in this kind of situation.