I realize this is an old thread, but I did this myself last night and thought I would add my 2 cents.
I was able to remove the hard top on my JK by myself. It wasn't too bad, I just put several blankets down on the ground immediately behind the Jeep, undid the fasteners, and lifted the top slightly so that I could put some old bath towels between the hard top and the sides of the jeep, enabling me to slide it backward easily without damaging the paint.
Then with the gate fully open, I sat on the back edge of the interior facing out the rear of the jeep, closed the back glass, and slid the top foward carefully until it was near the balance point. Then I just lifted it with my head and two hands and walked a step or two before kneeling and setting it down on the blankets. It ended with me lying on the ground underneath the top and lifting the glass so I could crawl out from under it, but I was done.
It was heavy, but I'm not a strong guy (6'3", 200lbs) and I was able to carry it a couple of steps without an issue. From there, I just scooted it up onto a furniture dolly and rolled it into its storage location. You just have to be careful to keep it balanced, and to make sure the top is totally clear of the Jeep before you start to lower it to the ground.
Getting it off can be done with one person. I don't think I'd want to try to put it back ON the Jeep that way, though.