When we were first married (20 years ago) my family was very supportive. Then we moved to the US in 2000, but started seriously working toward returning to the UK in 2008, when I was 61 and DH was 68.
My parents - particularly my father - was totally against the move, and made some comments resulting in our not speaking for nearly a year. He basically said "I can't see you moving back there, but if you are going, just go and don't come back here". At my age, that was very difficult to take.
Well....months later he had no memory of what he said, and it evolved into more of a "we'll miss you" attitude, but not really supportive or approving. I understand that it's difficult for them given their age, but we had to do what was right for us. I've made 1 trip back and am planning another in the new year, and not looking forward to it, as it will be a lot of crying, sighing, and so forth both upon arrival and departure. I don't like 'guilt trips' and unfortunately that's the feeling I have...the errant eldest child, who has left them.
Ah well - for most it isn't like that!