I bought both this year, a ground blind and a 12' tripod both sit about 20 yds away from my feeder and they both work fine. The tripod is a little harder to move around with out being spotted, but the ground blind I purchased was a little too small to move around in and get positioned to shoot out of. I would suggest you get a pop up ground blind designed for bows, and get the biggest one. Put a swivel chair in the middle and see if you can turn and shoot out of every window from that center position without having to get up and reposition. If its big enough to do that it will be awsome and stealth. Set it up where your gonna hunt and let the deer get used to it. Then hunt it.
I was in the tripod this year and had a descent buck about 15 yds from me , when I went to draw he actually heard the krinkling of my jacket and spooked, I think the ground blind will contain those little noises better.