Shanaar,
Lot's of good advice here from folks that share your disability (too tall -- I'm 5'6"). Being able to stand in the tree is pretty important. Without standing your mobility in the tree stand is much more limited than it needs to be. Of course they make large tree stands. My 6'2" son uses a buddy stand as his solo stand. He is a bit antsy when going up the first time or two. Get those ants under control by trying the stand out, especially moving and standing before hunting from it. You should be tied in when getting in the stand, out of the stand and while in it. A good harness system adjusted so you can feel it holding you when you are standing will do wonders. The key is to adjust it so you can feel it holding you. You can loosen it a bit as you get more comfortable. I really need to be able to turn 45 degrees right or left in my stand to access more shooting windows. Some of us to hang 20-25' in Baker climbing stands in the 70's without safety straps, belts, etc. It was always a bit spooky that first few moments in the stand on opening day! I feel fortunate I survived those days.