Hello,
Someone mentioned my name???
We do have several flowy machine built trails in the valley, such as the 17km Hallingspranget we built over the last 2 years, and could probably make a multi day trip putting then altogether.
But to be honest my feeling is Austria would be best. Perhaps a couple days in one location then move in to another. For example Petzen has an epic long trail and I’ve seen many videos out of bike parks in Austria with nice gentle flow trails. I’ve not been, except Petzen, but seen a lot online!
Not sure Jon’s place at Ride Slovenia would be suitable, I used to work for him and it’s some of the best trails I’ve ridden in my life but many are pretty hard! He does guide at Petzen though for example.
My experience of all the places I’ve guided or lived (various MTB destination/area in Europe) is that it is quite hard to find a weeks worth of consistently blue grade trails in an area, especially flow trails. So I’d suggest putting a couple of different spots together for a week.
Austria is my bet anyway.