It was the same when Robert and I went to Canberra, a 5 hour run. Robert had cramps in his legs as well and I was just sore all over, long trips are harder to do these days and Robert wants to drive down to Ballarat in Victoria, about a 10 hour drive, to see his cousin Lynn as she was hit by a car whilst cycling and left on the side of the road!!!!! She received multiple fractures to her body

Thankfully she is recovering well, but it will be a long recovery. That trip will take us a few days as we won't drive straight through, but take a day or two.
You are lucky Linda, not to suffer from long drives.