never too late. lots people are moving to ground blinds even up here in canada. opinions vary, some say, if you know its safe - leave it out a few days to a week for deer to get used to it. But if your spot is private but cant be watched 24/7, or its public, pick a spot, use brush or uprooted tree, whatevers natural there to break up its out line. And as others have said, no matter where it is: brush it, scent control it and get into it before sunrise.