Have been reading the posted messages on Trush and Boyko families from Valley River Manitoba, North of Dauphin, Manitoba.
My uncle's name was Fred Trush from Valley River, Manitoba, and one of his female cousins was also a Boyko.
Both families came over from Europe early 1900's and settled in the Valley River area of Manitoba.
Homesteads were granted to them in the Valley River area of Manitoba and including land north of Valley River.
Not sure if your relatives are related but your relatives may in fact be somehow related to mine ?
Don't know if this information may be helpful but I do know that the Dauphin Manitoba Historical Library may be of use to you in your search.Many Trush family members still reside in the Dauphin and Valley River Fork River areas of Manitoba.
Will post a follow-up if I find out anything more for you!!