Hi - I'm no relation, I was just browsing the Portage County board because that's where I live and I have access to the census records, so I figured I would help.I did see a listing for Ernest living with another family according to census records:
1900 Ernest Ruffner was living with the John Moore family in Suffield Twp. and was listed as nephew. White, Male. born May 1891, age 9, single, born Indiana, mom & dad born Switzerland.
1910 Earnest Rufener now lived with the Edward Moore family but his relation was now listed as servant. Male, White, age 18, single, born Indiana, mom & dad born Switzerland, laborer.
So maybe the other kids are with other families in the area.
I also looked up Peter in the LDS website and found a couple of items:
Peter Rufener married Sophia Halde 11 Apr 1884 Stark County Ohio.
Also, Peter Rufener (born 23 Aug 1856 Sigriswil, Bern, Switzerland) married Sophie Haldi (born 3 May 1864, Seanen, Bern, Switzerland) married on 11 Apr 1887 Ohio -- Peter's father is Christian Rufener, mother is Margaritha Graf, Sophie's father is Gottfried Haldi, no mother listed.
I saw a Christian Rufener in the census sheets also.
It seems strange that they would be married in Stark County Ohio, which is right next to Portage County, go to Indiana (which about 300 miles from here) and then come right back again.Maybe some of the kids wound up Indiana or in Stark County.