Warm weather don't leave!

Summer is almost over, and these nice days I'm sure will end very soon! Yesterday we played outside for a while. We usually have to wait until the sun is almost gone to play on the swing set though, until the wasps (or what I think are wasps) go home! But last night I had Cameron in his swing and one wasp flew out of it. So we ripped Cameron out of the swing only to find 4 wasps still underneath. No nest just chillin' out. We bought a trap, but they laugh at it, it catches every bug except wasps. Any ideas?