I have honeybees, but its the bumblebee that pollnates my blueberries, tomatoes, raspberries and strawberies.I see a few of my honeybees, working around my place, but most fly high and away to a prefered source of nector or pollen I usaually find one or two inground bumblebee nest eac year on my land.I love bumblebees, never been stung by one.Never seen them nest anywhere but in the ground.I know you need to get in and out of your barn safely, hopefully you won't have to kill them. Your sure they are not carpenter bees right...? They are aggressive/crazy , love barns, any wood building,actually,where they can bore holes in the wood for nest.