Notre Dame ? Wich one ? There are hundreds of places with this name in France 
If you are talking of ND de la Salette altisurface, you really dont need a turbine as it’s only at ~5200ft. https://www.basulm.ffplum.fr/PDF/LF3826.pdf
As DNBOF said the GotGravel’s Grravel and Savage Carbon are wonderful bush planes. But the one I love the most is the GG Savege Obstuction:
You can also have a look at the Bagolu’s bush Cessna 172 (available in 4 versions: Classic panel or G1000, with front wheel or taildragger. Search for bagolu on Flightsim.to). They are very good too, not only for rough terrains but also for longer VFR trips.
If you want to keep flying a DR400, choose the Dranbar’s 155HP Dauphin:
(If needed, you can power it up to 180HP as a 180HP version of the DR400 exists).
Last but not least, if you really want a STOL plane with turbine, this PC-6 is made for you (but you’ll have to wait a little bit):
Voilà , voilà …