I know first-hand what it's like to have a parent in a med school far away. My mother was about 2.5 hours from us for three years (the first year was closer and she lived at home) and it was very rough. We saw her every other weekend, because my dad was working at the hospital in our town and on call every other weekend (He was one of 2 CRNAs). Instead of uproot us, my dad opted to keep us and take care of us those 3 years. I was 11 and my brother was 8, so we were old enough to stay home alone after school. I really don't remember much family strife, and my parents kept a good job of keeping arguments hidden.
Looking back, none of us in the family have any regrets as far as mom not being around as much. She called every night (often many times a day with huge phone bills!) and we would see her when we could. They didn't take out loans because my dad had a great job, but he did have to work harder, and ended up covering 2 hospitals for more $$. I remember late nights watching MASH while dad was in the ER.
Anyway, sometimes the big picture is what is important too. It's hard to say that my mom did the wrong thing by going back to school and "leaving" us for 3 years, when I go back to the small community I grew up in and see people whose lives she touched and lives she SAVED.
My brother and I are very strong, independent people and I feel we learned that from our upbringing, which was strongly affected by taking care of ourselves after school and when dad was working. We are still close to our parents too. I call them every week, sometimes more, and my brother just got out of the Navy and is living with them while he goes to school.
So, for those that are parents and are going to go to med school (or are thinking about it), it's important to hear good stories to counter to bad ones, or people who tell you your family and kids are going to suffer. Yes, your time will not be as available, but there are many other things too that can take you away from your family. At least this has potential for a good outcome.