This is a mod we did for our pop up camper, tried it for the 1st time this past weekend. We used a pool noodle for a gutter system to help channel the water condensation from the A/C unit away from our canvas ends.
LISTERINE!! any color/flavor. Pour it in, full strength in good sturdy spray bottle. Spray around your tent site & picnic table or patio & lawn chairs. (I mean saturate the ground and you can spray a little on things that you don't mind getting the mist in). You will be amazed! No Mosquitoes, no no-see-ems/gnats. You will have to repeat after rain or if animals stir up the dirt a lot. This is safe for kids, dogs and it doesn't have the stickiness or chemical smell. Try it!