Marseille to Val d'Isère - TGV, TER and car from the Med to the Alps

I was going to stay with my daughter and her partner in Val d'Isère in the French Alps It should be quite a nice run up from Marseille on the mediterranean coast... except... the French are having strikes and the service is very curtailed. Looks like I'm going to need some help to make it to the final destination!
1st Leg:
Departure: Marseille Saint-Charles, France
Destination: Lyon Part-Dieu, France
Distance (approx): 278 km / 173 miles
Duration: 1 hr 45 mins
Cost: (if booking about a month in advance) 1st Class €49 2nd Class €34
Date of Travel: March 2023
Operator: SNCF (Société nationale des chemins de fer français)
Motive power: TGV Duplex Alstom (2006)
2nd Leg:
Departure: Lyon Part-Dieu, France
Destination:Chambéry Challes-les-Eaux, France
Distance (approx): 87 km / 54 miles
Duration: 1 hr 29 mins
Cost: (if booking about a month in advance) 1st Class €32,30 2nd Class €21,30
Date of Travel: March 2023
Operator: SNCF (Société nationale des chemins de fer français)
Motive power: Regio 2N duplex EMU Alstom (2013 onwards)
3rd leg:
Departure: Chambéry Challes-les-Eaux, France
Destination: Val d'Isère, France
Distance (approx): 139 km / 86 miles
Duration (approx): 2 hrs 25 mins
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