I bought this clothesline after being tired of having ropes strung up like a spider web between my trees.
http://www.eclothesdryers.com/folding_body.htm
You can close it up like and umbrella and put it in the garage when you don't need it. Holds lots of clothes too! Don't forget that it's cheap! Just like the one in the Gaiam catalog but for like $100 less, and just as good. Buying one of these would be so much easier and cheaper than building the pipe one, and less permanent as you can remove it from the base in the winter. Even with shipping, it was only like $36 bucks or so (already strung!).
To make your clothes soft, put them in the dryer for about 10 mins to fluff them up before hanging outside.
I found that in the summer when i'd forget the laundry and leave it out all day especially on a breezy day, the clothes would get whipped around so much they'd actually be soft, rather than their old stiff selves.
And put a pantyhose stocking or two over the end of that dryer vent to catch the lint. And watch out that you're not growing mold from the extra humidity in your home/basement.
Here's my old tree-strung clothesline from a couple yrs ago. I dont' have any recent pics of the newer umbrella one. GUess it's time to update the webpage!