Henry Appears in the 1870 Siuslaw, Lane, Oregon Census in the household of Jacob Grossman.
Jacob Grossman 47
Sarah Grossman 41
Eliza Infield 20
Mary I Infield 17
Henry Winkle 21 (birthplace Missouri)
James Young 18
So I guess maybe there might be a connections with the Wenkels you found in 1850. I'm not sure which place is correct given the fact that in all the census's for Ora Alice Winkle (Henry's daughter) states her father was born in Missouri, Oregon, and Michigan. But since her father died when she was only 3 that's plausible she didn't know for sure where he was born.