How long (span length)?
For my shed, which is 24x24', only 2 of us set the trusses in place, and the height was 10' above ground to the plates. Each truss was lifted one end up (2 people on the ground), and then the other end was lifted with 1 person on the ground and the other on the plate using a rope to lift. As I recall, it was a super downpour rain, and both of us (once wet) were too stubborn to stop. Once up, the trusses were tipped in place, lined up, and nailed to prevent movement and racking.
Granted, there is equipment to rent to make this chore much, much easier. And that is what I would do today, with being older and having more funds to play around with. /forums/images/graemlins/smirk.gif