Yes, even with a mountain guide, mountain sports are not risk-free! Mountain guides are professionals regularly trained to deal with risk managing. But some of the risks, because of their unpredictable or complex character for example, can’t be eluded. For instance: stone falls, serac collapse, crevasse, avalanches etc..You’ll have to share those risks if you come with us!
It is your responsability to check your own insurance cover. Mountain guides have a professional insurance that cover you in case of professional fault.
For private guiding, only 1 pers. For group guiding, this is usually mentioned on the activity pages.