(I hope this is conveyed well.) Take plenty of photos of all of you together. It’s a great way to bond and there is scientific evidence that we hold episodic memories from photos (among other things.)

Looking at Your Photos Can Be Uplifting, Enlightening, or Bittersweet

Also, we never know for sure when something unexpected might happen to any of us. So it is better to save photos of those memories with significant others, family, friends, etc.