We have done the Lake Geneva on to Soin and the Simplon Pass we found it ok but when stopped at the bottem our hubcaps on the caravan had melted, a plus if you go that way is you do not hit any motor ways so you do not have to get vignettes so saving
We have stopped over night at larg service stations, the first night, not small air de rest,we allso have personal alarms fixed on the door and windows they realy do scream if opened. and only cost