About your needing to "live independently" while you're there - that, actually, doesn't sound like a bad idea to me since you plan on "spending more time there as you grow older." Perhaps it's a good idea to rent your own accommodations, even if partner doesn't come. Surely it's a good idea to do some things on your own and hire a car to do so. This is especially true if there are "family issues" going on and, maybe, dd and sil need their space.
If you want to keep your relationship with your partner, however, Idk how often you can go there. There may have to be a limit. You really need to think this through more, imo. But when you do go, by all means, go alone.