Chock Full o' Nuts-
You cannot own what is going on with your mother, you can simply do what you can to make it as easy as possible on her. See about helping her with bill paying and simple things like that that can throw a monkey wrench into her life once she is able to enjoy it again if they are not taken care of right now.
My mom (75) had pacemaker surgery in April and they discovered she had low O2. She started Oxygen Therapy in May and went from 6L to 4L with respiratory therapy and medications, but will be at 4L (or more) the rest of her life. We are trying to figure out how to make overnight travel (including camping) as easy as possible given the heavy equipment (she can't possibly lift and Dad hasn't tried to).
My dad (77) had hip replacement surgery in October and has done extremely well. He can now do pretty much anything he wants when he wants to. His biggest challenge is to make sure mom doesn't feel like a "burden" or a "nuisance" (her words) and to help her stay active enough but not too active.
I am hopeful that the doctors will figure out what is going on with your mother and that it is treatable without causing her more surgery and pain. It will be awesome to read your stories about going camping with her as she gets back into the swing of things!