Can I trust Google Maps driving time estimates? Generally accurate?
Driving times indicated by Google Maps are fairly reliable for those who are used to driving in the region on sometimes winding country roads, who don't care about the scenery and don't take any breaks. Adding 10% would be more reasonable.
Important to remember:
Directions to cities and villages are very well indicated by road signs as well as all tourist places such as caves, castles, museums, etc. As below after Souillac towards the Gouffre de Padirac:
(Martel and Gfre Padirac have a brown logo meaning a tourist place)
https://maps.app.goo.gl/kqPZfk4aLB9izrZj8
In small villages like Carennac you will have to leave the main road to get to the center of the village, which makes you go through this kind of street:
https://maps.app.goo.gl/gpw6SC2kuJyeSWc47
In case of doubt always follow the road signs rather than the GPS. The GPS, by wanting to save you 1 minute of driving can make you drive on a dirt road used only by agricultural tractors.
All tourist places and small towns like Sarlat or Martel have parking indicated by signs.
Some like Sarlat which have traffic problems because of the crowds have paid parking.
The city center of Albi (near the cathedral) is difficult to access by car. There are paid parking lots nearby
Restaurant servers are usually used to seeing tourists who do not speak French and have some basic knowledge of English, or even German or Italian. However, do not expect to see menus in English everywhere.
In this case, with an online translator you will be able to understand that:
Tourte de confit de canard aux cèpes et oignons caramélisés.. is a Duck confit pie with porcini mushrooms and caramelized onions.
(extract from a menu in a restaurant in Martel)
It's generally quite easy to have lunch in 1 hour. As everywhere, there are efficient restaurant staffs and others that are slower.
As I see that you are planning some wine tasting and to visit the Louis Roque distillery, be careful when mixing driving and alcoholic beverages.
It is forbidden to drive with a blood alcohol level greater than or equal to 0.5 g/l of blood, which roughly corresponds to 2 glasses of wine maximum for an adult.
The police do not joke about this. You risk a heavy fine and a driving ban for a few hours.
Not to mention the consequences in the event of a car accident.
Addendum:
Regarding the caves:
Check the opening times on their websites. Some are currently closed until the 2025 season (around late March).
Cave tours are with guides and specific departure times.
It is advisable to book online in advance, especially when there are guided tour departures in English.
There are usually free brochures in all languages at the site reception.
April is a relatively quiet month for crowds, but note that in the Dordogne department (Sarlat) there will be school holidays from April 19 to May 5 and in the Lot department (Padirac, Martel, etc.) it will be from April 12 to 28. This may bring more French visitors.
The temperature in the caves is 13° Celsius (55F) regardless of the time of year. It is poorly lit (intentionally), wet and often slippery. Bring good shoes and don't go there just with a T-shirt.
Thefts are quite rare but don't push your luck, do not leave any valuables or important documents in the car during the visit.