Samara was pre-R1b-M478. Not a very successful lineage.
Why are you linking this to geography? Afontova Gora was essentially fully "West Eurasian" genetically, but the blond hair alleles undoubtedly evolved in East Eurasia. There are no blond hairs in Europe prior to the migration of Steppe populations to Eastern Europe.
Blond hair today is not so rare in Western Mongolia, southeast Russia and Kyrgyzstan. If current trends persist this area will indeed be blonder than whites in Europe and America in a century (consider that America is 75% less blond than it was 100 years ago).
Then we have the very problematic existence of the Copper Inuit..
AG/ANE were a mix of East Eurasian and West Eurasian ancestries.
I really think the blonds in those areas are a minority. There are many cherry picked images on the Internet, but in crowds blonds are exceedingly rare.