I have camped in an REI / Kmart / Walmart net hammock for about 10 years.  After I put up the hammock I use a siltarp hung over a line run just above the hammock.  Tie the tarp corner to corner.  Just stake the other corners to the ground.
In my experience nylon hammocks start to sag about ½ way through the night.  Put up your net hammock as taut as you can then lay in it for about 5 minutes to stretch it out.  Get up pull it taut again and hang your tarp.  The line between the trees makes a great place to hang items you may need during the night,  Water bottle, flashlight etc.  Pull the tarp back and you have a very comfortable seat for during the day.
You can get a one man net hammock for about $15.00 but I prefer the room of the 2 man for about $25.00.
I don’t leave home without my hammock.  It’s great for picnics.  Girls always want to “try” it out.
Cameron
Oh yes..During bug season I sleep with a head net on.
  
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