How do you keep bees away from a barbecue and picnic?

One way (if you are near trees or something you can tie it to) is to take a brown paper bag (any will do even a fast food bag) and make it look sort of like a bees nest. (Blow a little air into it to get a roundish shape and close up the top) You can also buy fake ones but this is much easier. Hang it up near the area and it keeps the bees away. I tried this technique and it worked! From this solution, I have to guess that bees mistake the puffed-up bag for a hornet's nest and that they are bitter enemies, mortal enemies and avoid trouble by not pushing their luck and just leaving the other's territory.