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Tony - I have done most of those (except brown bags) but have not been effective. I had the bee guards on but since they were yellow in color they attracted them more ? I don't know. I don't have any nests around the porch so they must be somewhere else returning here for food.
This option seems to be working but it is so sticky and humid here I am worried about the copper tube contaminating the sweet water.
I think it is the smell of sugar that attracts the wasps to the feeder, not the yellow colour. I don't like to put anything sticky or oily near a hummer feeder in case it gets on the hummers.
The ultimate wasp trap is a jar with a piece a meat in it. attach a piece of tin foil over the top of the jar and make a hole in it large enough for the wasps to enter. They will smell the meat and go into the jar, but for some reason they can never figure how to get out.
Warning: this method is stinky.