This April, I'll have 5 days from Paris to Montpellier or Nimes. I'll be travelling with my wife and 15 year old daughter. Should we drive or take the train or plane? Worried that too much time spent on the road. Would anyone know how long a drive that will be?
Many thanks for the link. Does anyone have any suggestions as to places to visit between Paris and Montpellier/Nimes? Can anyone recommend a place to stay in Bordeaux?

I would suggest that Bordeaux is rather a long way off your ideal route.
If you take the route suggested by the link in #1, Dijon and Lyon look like the obvious places to stop...

There are SOO many places woth seeing on that route with a few daytours that one could plan to do the trip over one or 2 months. So better get a guide book and select what you 3 finds interesting.
And I bet that seeing a vineyard in Bourgogne in reality isn't such a thing. But: Dijon, is fine -add Beaune, Aix-en-Provence Avignon, Pont du Gard, Camargue, Arles and you are more than set!

My personal favourite would be this:
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1st day: Paris - Bourgogne(Burgundy) - Clermont-Ferrand via free/no toll highways. Roughly 350 km. Overnight, plenty of good restaurants there. Or do another night stop in Orléans.
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2nd day: Absolutely use A75 - the most spectacular no-toll motorway in the whole of France - not just a motorway but really something to be mentionned positively. Plenty of side trips possible - at Massiac's tourist office, ask for a special folder about such side trips from A75. Don't miss to drive down to Millau as otherwise you can't see the famous viaduct. Roughly 200 km. Overnight again, nice restaurants to found there, too.
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3rd day: On A75, continue on to Montpellier, now turn left and on to Nîmes. Roughly 150 km. Welcome to Provence!