Good advice, but not neccessarily a definite need, you can relatively easily get in done without a blind with the right setup....main thing is using surrounding areas as cover. Cedar trees work great, heck any tree trunk, my buddy routinely kills birds each spring without the aid of a blind...often times in an open woods setting...all about timing of when to draw, and keeping the tree between you and the turkey most of the time.

I too use a blind to help give me a little advantage, but it can be done without.