3 acres isn't that much but if you saw lots of deer last year once a week this should be fine too.But in a ground blind that is allways set up you could probably get away with hunting it more especially if they only funnel through one or two areas of your hunting ground.If it was my only hunting area hell, I'd hunt the thing every day I could.
You only have an opportunity to kill one, if your out there hunting.
It's a gamble but unless you do it you will never win.