Stang, travel safely. It's a difficult time. Hugs to you and husband, I'm glad she died peacefully and without husband having to authorise turning off the machines. On top of the grief, that sort of responsibility brings needless guilt which can stay with you for years even though it's often the right thing to do.
Now you can work through grief together and remember all the good timed when she was well and young, without having to focus on these last difficult times.
Keep us posted on how you're all going.
Marg