Recently NASA did a study on coatings for wings that was supposed to shed bugs. A Google search for a US map of flying insect density returns nothing useful.
Please post your experienced Bug density according to the following scale and what state this data is for. I will summarize the results in a map of the US if I get enough data.

0 - never saw a bug splat on my glider
1 - light, here and there splatters
2 - moderate, a few bugs per foot of wing
3 - heavy, lots of bugs per foot of wing
4 - very heavy, many bugs per inch of wing

You may also note if you have a bug problem only during short "buggy periods" but I am more intersted in what you feel is a season average for your area.
Thanks !