After/during WW2, my great-grandparents and grandma fled from their home in Wildenschwert-Hilbetten (now Ústí nad Orlicí) in the Sudetenland and trek'ed into Germany. They had with them my great-great-grandmother, who according to oral history was very frail. My assumption is that she died soon after they arrived what with the conditions and lack of food.
The rest of them ended up in Thuringia, where they settled. However, there is never any mention again of my great-great-grandma and she didn't die in the town where my great-grandparents eventually settled.
I had hoped that there was some sort of registration of these refugees, but it seems all there was is the Kirchliche Suchdienst, which focused on where they were from not where they were going.
Other than searching the Standesamt of every town along their likely route (which could be costly), is there any possible way to find where my great-great-grandmother died or at the very least where they were temporarily housed along the way?
I know it's a long shot, but perhaps someone has experience with this type of search.