Practice, yes, and a bit of testing - and lots of photos, and as soon as possible. The reason being, your fame is spreading to other websites and I don't want someone else getting some stone rowing credit.

This lot are into moving stones bigtime, but they find it a bit hard. I reckon they’re in for a surprise.
http://www.bigstones.com/index.php

Also, here's your American cousin:
(Trouble is, he doesn’t say how he does it, and you have to pay to find out!)
http://www.gizapyramid.com/wallington.htm
(I reckon he walks them, since he does it alone, but if he wasn't JohnnyNoMates he might hit on your idea).