I'm close with my parents and the whole family (sister, nieces, grandparents, etc) lives within an hour of each other. Parents are still together and I usually go down to their place every Saturday. Grandparents are nearing 90 and showing degenerating symptoms every year, but still get out to tinker, mow the grass, garden, woodwork, etc.
Almost lost both last weekend to a head-on car crash, so I absolutely agree with your advice of cherishing the time while you can. We're incredibly blessed we've all made it this long!