Weisenstein Pass (France to Switzerland)

Quasar524

Does anyone have experience of going over the Weissentein Pass from Gänsbrunnen to Oberdorf in the Swiss canton of Solothurn?   I'm looking for an interesting route from Belfort in France to Langenthal in Switzerland, and this looks enticing.   My usual means of investigation, Google Street View, doesn't help, as I think the Swiss authorities banned the camera cars.  Would be travelling in a just over 6 metre motorhome.  Travelling in July, by the way.

Any advice or information would be very welcome.