Yes, there are feral hives. Supposedly all were wiped out due to mites & "Colony Collapse Disorder" back 10 years ago. The theory is the new feral hives spread from commercial/hobbyist hives. Back in 2012 my tomatillo plants were covered in European honey bees & I had a bumper crop of tomatillos. 2013, nearly zero. Yes, pollination still happened but I got half the tomatillos. 2014 there were more bees, likely from a local hobbyist. This year, there are a decent amount, but nothing like 2012. They do go as far as 1.5 miles from their hives
You mentioned blueberries. Blueberries are particularly bee dependent. Commercial farms rely on commercial beekeepers (& have their own hives) as do dozens of other crops, like almonds, fruit trees, etc. Almond groves in particular have no wild insects nearby at all & are completely reliant on migrant beekeepers. That goes both ways, Beekeeping & the honey industry has never been very profitable & has come to rely on income from farmers to survive.