I found these two families in the 1930. Does it look like Charles and Alta, children of George and Mary Howe?
Tumalo Precinct, Deschutes, Oregon:
Jones, John L, Head, 40, Ohio,Oh, Oh, Farmer
----, Alta M, wife, 19, Ore, Can-Fr, Missouri
----, Irving H, adopted son, 6, Ore, Ohio, Ore
Peterson, Robert R, nephew, Ore, Calif, Ore
Mickle, Charles H, head, 43, Divorced,Ore, Can-Fr, Missouri, farmer
It looks to me like they are, with two glaring errors; George, their father, was Can/Eng, not Can/Fr, and Mary, their mother, was b. Illinois, not Missouri.
It also looks like one of the Mickle girls married a Peterson, and by 1930 at least two of their children were parceled out among the relatives.
LOTS of supporting detail below.
In 1900, the family is in Antelope, Wasco, Oregon:
George Mickle, 57, head, Apr 1843, Canada, Canada, Canada
Mary Mickle, 34, wife, Nov 1865, Ill, Canada, Ill
***** Charles Mickle, 14, son, Jan 1886, Ore, Canada, Ill
Clell Mickle, 10, son, July 1889, Ore, Canada, Ill
Hazel Mickle, 8, dau, Nov 1891, Ore, Canada, Ill
Erie Mickle, 6, dau, July 1893, Ore, Canada, Ill
Irena Mickle, 4, dau, May 1896, Ore, Canada, Ill
George Mickle, 5, son, July 1894, Ore, Canada, Ill
Mary Mickle, 7/12, dau, Nov 1899, Ore, Canada, Ill
Charles is gone by 1910 and Alta isn't born yet.
In 1920, part of the family is in Portland, Multnomah, Oregon:
Mary Mickle, 49, head, Widowed, Ill, USA, USA, housekeeper, private family
Charles Mickle, 23, son, Ore, Canada, Ill, laborer City
Vera Mickle, 21, Ore, dau, Canada, Ill, milliner, shop
Mary Mickle, 19, Ore, dau, Canada, Ill, operator, telephone
Leota Mickle, 15, Ore, dau, Canada, Ill
*** Alta Mickle, 9, Ore, dau, Canada, Ill
Mary isn't widowed, "Charles", age 23 is really George Jr., and Mary's father's BP isn't USA.
In 1930, two more children - Vera and Leon - are in Portland, Multnomah, Oregon:
Vera Mickle, 32, head, Ore, Canada, Ill, book keeper
Louine Peterson, 6, niece, Ore, Canada, Ore
Leo A Mickle, 22, brother, Ore, Canada, Ill, cook restaurant
Note the Peterson niece. Alta and her husband, above, have a Peterson nephew.
Have I nailed it, or have I set a personal record for jumping to the wrong conclusion?