Have been hunting deer since 1982. With good camouflage and a bit of care it is possible to get very close to deer. On a few occasions I've gotten as close as maybe 10 foot. At that distance, well, you can see the hair on their shoulder move. And, they can see you just as well. Ghillie suit properly matched to surroundings would allow you a meaningful advantage for getting close. It would be helpful if simply sitting by a tree watching and waiting for deer to move, come close, etc. Closest I ever shot a deer was maybe 25 foot. I was wearing BDU's and blck army boots all given to me by my brother. It was to hot/heavy for the weather, but it did a fine job in the swamp/woods where I was hunting. I am looking/thinking ahead to next year. I will probably do some sort of Ghillie suit. The area where I will be hunting will be mostly wet, swampy, scrub oaks, etc. Any shot is just about guaranteed to be from hard off the muzzle to maybe 100 yds. I won't need a cannon. I figure my .30-06 will be just fine. I've never had a deer stand up after the first shot. I figure a Ghillie suit will let me move alone and get in close. Sincerely. bruce.