No, it would be unprofessional to go visit a student’a family as an EA unless they were a family friend outside of school - and if you did you definitely wouldn’t be bringing a notebook. You aren’t supposed to just write sensitive personal information about a student - especially not disability related information - on a notepad and walk around with it out in the open. Teachers and administrators handle most meetings, they do it at the school or remotely - not in the family’s home - and they take steps to reduce or eliminate risk of personal information being mishandled. A scenario where an EA goes to visit a student’s home with a notepad during the school day would be extremely unusual, imo.