Is that far? We are spending 3 weeks in France so I figured we'd vineyard hop up that way. I have a relative that lives in Toulon so we use her house as a homebase. Would love to spend a week at the Marriott village dell France if I can get a exchange.
It is certainly practical, as long as you understand it is almost the full length of France from South to North.
I just checked though and I had overestimated, it is no more than 800km or 500 miles.
We drove it on the autoroutes twice a year for many years, as either one very long days drive or two more leisurely days drive with an overnight stop.
Alternatively, you could take the fast TGV train from Marseilles to Paris in under 4 hours or fly then make your way out to the MVC resort.