Try a triangle bee escape. You need to plan a bit because it takes about a day for all the bees to vacate through the escape, but if you don't need
to extract all your hives on the same day, the triangle bee escape is the most stress free way for both you and your girls.
The way it works is, bees navigate according to a very strict set of rules. When a bee reaches an obstruction (such as a wall), it will always travel to the right and follow that obstruction till it can go no further. It will never go left. In the case of the Triangle Escape Board, it is easy for the bees to leave - there are three convenient exits. However, they are unable to get back in - and so your Super will soon be empty of bees (unless you get that rogue bee who always goes left