(NY) We get the "June bugs" coming to outside lights and windows after dark
in May/June.  Once I was called to come collect swarming bees in a willow
tree, only to find out they were not bees after all, but hundreds of
beetles darting around the perimeter of the tree.  Against the sunset I
guess they could have been mistaken for bees, size-wise, as well.
 
Given the description, size, color etc. I would tend to go with the
June-bug/beetle ID too (or a close relative?).