Bonjour,
Unfortunatly I found no McRae or any variant of the name in the cemetery in Mont-Saint-Gregoire, and I made an exhautive listing of the names I could read on the headstones.
However that cemetery was probably not in operation in the period your family was in the area. When the first cemetery was abandonned they moved a part of the headstones in the new one but most of them are broken or unreadable.
If I ever find something I will let you know,
Bonne journée,
Fernand Boucher