Road trippin

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Road trip thread, stories, advice, photos etc.

Suppose you want to take a road trip from the Balkans to the south of France (spend a couple of months somewhere as a volunteer, practice the language etc.) What can one use to plan their itinerary across Europe?
Ideally I'd like to avoid highways (I'll be in no rush) and other toll roads, so I'd need up to date information on which countries have vignettes, what the toll roads are and other added costs.
And of course there are other questions like can you camp in the car in Serbia, Croatia, Slovenia etc. and is it a good idea to do so, maybe pitch a tent and camp next to the car or just use hostels, what parts and tools to carry in the car and so on.
I'll be saving up some money till spring next year and I still haven't decided on it firmly, because if the costs are too high I'll just buy plane tickets, but I think a road trip like this will be an adventure in itself.