It sucks....
Just closed up mine about a week ago.
Wound up doing it on the wing stands (as opposed to laying them flat on a table.
It is a two or three person job.
Spend some time figuring out your rivet strategy.
I wound up riveting from the trailing edge down about 1/3 of the ribs. I then used access panels, lightning holes. Did the entire trailing edge and first third of the ribs. Then I worked down the ribs about 4-5 rivets per rib at a time.
Last I went back and did the leading edge.
The trailing edge was the most painful, by the time you get down to the leading edge it isn't too bad.
-Dan