OP
Why do you make a 12 hour drive vs a 6 hours? Why overcomplicate this?
Why putting your gd through 6 hours of car drive taking her to your house? That is totally unnecessary.
If I were your exsil, I would be very unhappy about that.
As a person, getting stuck in a car for 6 hours a month for a visit I am forced to go would suck too.
What is more important, spending quality time with your gc or taking her to your house?
By special request, let’s discuss our favourite Classic Music and why?


. Some good suggestions have been made already and I hope that you'll be able to find a better way of managing the journey to see your GD.