In reply to Slugain Howff:
Have done loads of these long weekend trips for skiing and climbing as the early flight out of Edinburgh always allows action on the hill by 1130/1200.
We've always hired a car though which between 4 isn't too expensive.
Then the only other thing to book is a base.
We've had trips (esp January) when it's snowed very heavily every day but we've just headed to the low lying tree resorts. Would have been stuffed without wheels in some places.
Other trips when we've made trips to resorts with better snow- local areas hard packed in the sun and effectively no off piste- yet 30-45 mins away north facing or more recent snow has saved the day. Nothing worse than sun baked slopes if you're only out for a few days.
Depends what you're looking for but we've nearly always found that to find best touring/off piste on such a short trip a car is very handy.
Funnily enough Chamonix as a base allows all options in all directions!
For what it's worth- we skied Verbier for a day at the end of a long touring trip and whilst it had some fine skiing i wouldn't put it in the same class as the other mega resorts. Lifts were awful- We all thought not a great place to come back to with the kids either- TBars left right and centre.