Yep, they do fly and I have heard that they will travel up to three miles to get to a hive. I have my one and only hive up on a deck. I also sprinkled diatomaceous earth in the cracks of the deck. I seem to always have a few in the hive anyway....Of course that won't stop flying insects (dumb question... do SHB fly?)
Try the opaque Plexiglas top and SBB technique. SHB dont like light, drive them out.