My late husband had a similar deal, massive killer chemo and stem cell transplant 15years ago. He tolerated it well and was cancer free when he passed from other health issues 7 years post transplant. His was a clinical trial at Mayo Clinic, he was the 1st patient over age 60 to have it. It is now a standard protocal for several types of cancer.
The journey isn't a walk in the park but it isn't too bad. John, you have a positive attitude about it and faith in your medical team, you got it!
But some extra prayers are always good so adding mine too.