We have a large screened in back porch - it's our favorite room in warm weather. No bugs.
A friend has a real nice un-screened gazebo in his back yard, and I laughed when he put a ceiling fan in the center of it. The laugh was on me - mosquitoes can't stand the wind from the fan and they leave you alone. Turned out to be a smart idea.
These are "old people" remedies - kids don't mind chiggers, ticks and mosquitoes like us old folks do.