Build four walls around your grow area and put a roof on top, LOL. Seriously, there's not a hell of a lot you can do about bugs outside. I'd try multiple techniques hoping to head-off the problem from several angles. Keep your plants sprayed down with Einstein Oil. Get a non-poisonous, multi-species insect control spray (I use "Zero Tolerance" and it works great), and maybe even get a bug zapper out by your grow area.
To keep deer, woodchucks, and other four-legged pests out of your garden, you can use bobcat piss which can be found at most hunting-centric sporting goods stores. For added measure, I always piss in a big circle around my outdoor garden.