I didn't realize that some hydrangeas attract bees. We have a number of landscape hydrangeas and the bees largely ignore them. It's not for lack of other bee friendly foods in our yard though. We overseed our lawn with clover that we let get to flower, have a bed of echinacia, another of milkweed, a large rose of sharon that the bees absolutely love, and some st. John's wart (another favorite).
The only time I ever saw bees checking out the hydrangeas was in the fall when there were very few remaining options. It was kind of sad :(
I'm not sure what kind they are exactly, but here in New England they literally buzz from July to October. Rose of Sharon gets the humming birds to our yard.
I don't know that I've ever seen a hummingbird in our rose of sharon, but I have seen some visiting our canna lilies. They were a very happy/welcome surprise.