I leave mine out early as well. However, last rifle season I put out a blind to bowhunt in, and then rifle hunted the area for a couple days. While I was scouting around, I saw 10+ deer walk within 15 yards of that ground blind not more than 5 hours after I put it out. After seeing that, I wouldn't be afraid of putting one up and hunting it right then. This was also out in the middle of a stubble field, not hidden well in the brush.