The best way to deal with wasps that bother you is to make a trap. Take an empty 1.5 litre plastic drinks bottle and punch a few holes around the top. They should be big enough for a wasp to crawl through. Pour in a few inches of cider into the bottle, seal up the lid, then hang the bottle up, preferably high off the ground so it's out of the way. I hung one from the top of a flagpole at a festival this summer and it worked a treat. The trap will catch literally hundreds of wasps per day. They climb in through the holes, attracted by the cider, and can't find their way out. They eventually drown.