I've never experienced a problem with insects so severe that it couldn't be solved with Deet. However, I live and do most of my camping out west. Things are drier here and bugs are not as big a problem as they are east of the 100th meridian.

I've spent a lot of time from spring to summer and early fall, in Alaska, where insect swarms can be biblical. But even there Deet does the job for me. I suppose that everyone has different skin and therefore the the problems that come with insects vary from person to person.

So to answer your question, I don't use a bug shelter and know nothing about them.

Wind in my hair, Sun on my face, I gazed at the wide open spaces, And I was at home.