Find a small person with long arms to help. Patience. Be prepared for your arms looking like you might be a cutter. Patience. Watch the areas where the skin is pulled up so you don't make a smiley. Patience. Always cleco one more hole down than you are working to keep the skin flat for the rivet gun. Patience.
A wing stand is a big plus, we made one in about 30 minutes from some 2x4's, cost about $30. It only has to last through this phase.
If you have a kid helping they will learn a few new swear words that day