Now I've already sort of forgotten, but wasn't there an issue where a son went off to war and she didn't ever hear from him since the war? (Or am I mixing this up with the one about Mrs. Whipple's son who was in the war maybe?)
Since Amy seemed to be in good health, it is a shame she could not travel to visit her family, or maybe she didn't feel welcomed by them to do that. Maybe she could not afford it. But yes, I think involving all these other people in her deception, including a priest, as well as the Ingalls family, is wrong even if done for a good reason, i.e. because she loved her family and wanted to see them.
I also don't actually now how common it would have been back then for family to travel from all over for a funeral.....didn't they need to bury the people pretty much right away after death since they would not have had the means to preserve the bodies and decomposition would set in? Charles didn't travel back to the Big Woods for his ma's funeral.