OK, I'm finaly getting in here with some pics. We use these guys and I don't know what I'd do without them!

It's amazing how much weight and old bicycle can carry!
I have dealt with back problems and have learned to lift wisely. I have sometimes found it easier to move timbers on my own rather than with the 'help' of another - the other person not knowing how to lift properly can easily wreck a spine (and fingers/toes!)
A canterlevered timber can make it's way quite a distance with stratigicly placed horses; pushing down on a timber is a lot better than lifting one up.
Good Luck!
*K