Tignes - How to get there from Geneva in April 08

We are travelling to Tignes in April 2008. I am driving down and joining my wife and daughters there.

I would prefer not to have to detour to Geneva Airport to collect them but can't seem to find a reasonably priced alternative (they get into Geneva at 15:10 - too late for the 15:30 bus and too early for the bus at 20:00)

Any help would be most welcome.

Regards
Ian

You can contact some private transfer, which ends up a bit more expensive than the bus, but not too much (bus is 90 euros pp return and private transport could be around 100 or 120 euros return pp) and much quicker :D(around 2h30 vs 4h00 with bus) or hire a car and drop it in europcar in Bourg st Maurice and pick your family from there.
The hire car companie is near the train station, so they can drop the car and take the bus to Tignes (around 10 euros pp and 45 min. to 1 h), but that will be a very long day for them ! :!:
With a car Tignes is only 30 min. from Bourg st maurice (more or less if it's Les Brevieres or Val Claret)
If you want some info on private transfer companies, pm me.