I have had some problems with yellow jackets latly around the house. And have always had them when camping.
I do not swing at them I hear the do sting bad.
Take a plastic bottle soda, milk, and container you can toss later that will hold water.
you will need string or thread, meat and apple, water and liquid soap.
Cut a hole around the size of a penny. I used a knife and folded in a flap.
make one on each side about half way down.
fill the bottom with soapy water. I put in liquid dish soap and pored water on top and swirled.
Old meat or fresh cooked meat works best. Gets the aroma working.
Ties string or thead around it leaving extra string to hang it.
put some apple in the bottom. It will float.
put the meat inside the opening so it is a little above the side openings.
keeping part of the string on the outside of the top and screw top on. or tape it on and tape top closed if you used some other type of container.
I took a little meat and left it near it so they would be attracted to the area and removed it later.
If you can hang it somewhere so the wild animals that come in at night will not rip it up.
I 5 or 6 in an hour and non were near when I put it out.
Ron D.