Take a sister trip - or a sibling trip.
Don't let those excuses delay you. 'When the kids leave home we will..' 'When I retire we will...' 'When it's better timing at work we will...'
Relationships take work, even relationships with your family. Maybe even more so because we tend to take those relationships for granted. Relationships evolve as we get older.
It can be something crazy fancy or a camping trip in the mountains or just lock yourself in your house for the weekend and talk.
Although the location was amazing, the truth is, the location wasn't what mattered when my sister and I took our trip. It was the experience of spending time with my sister as two adult women. As sisters one would think we know everything about each other but that's not the case. We each learned something new about the other. Spending time with your adult sister is so much different than growing up sisters as kids.