Family dynamics are interesting.
We've raised our kids with the understanding that we're going to live where we want to live and the kids will do the same. Probably stems from both my wife and I being in the military and not living "back home" ever. Closest for me was Texas, 9 hours from Birmingham. She's 5.5 hours away from "home" in Montana.
Neither of my kids are close with any of their cousins, aunts, or uncle...but they're pretty close to one grandparent We used to visit Alabama a few times a year, but that slowed down a bit once there was some family conflict. We've been open with our kids about the decision and believe they fully understand the reasoning. I'm of the opinion the next time I see family in Alabama, it will be for a funeral.
I believe that the core 4 of us is pretty tight. Both will go to college in Montana, after that who knows. At the moment, I don't plan on moving to be closer to them if they end up elsewhere. I'm home now
I can fully understand keeping a family tight. To each their own, as a parent I've made decisions based on what I think is right in both the short and long game, realizing later that I've created an unintended consequence from previous decisions, which I just can't change.