No you are not stupid........you just learned a lesson. Always practice with the gear you intend to hunt with and how you intend to hunt with it. Now that you' ve learned from your mistake you will be that much ahead of the game next time.

That specific deer might not show again at least for a while, but you said you' ve been seeing deer (plural) from that spot? And it seemed pretty at ease with the blind, so I say make sure you have a good wind and why not try it again?