%%Good question, but I can't resist asking what makes you think I would know
why hippies leave their clothes in the woods;)?  Oh alright since you asked
I'll give it a try.  READY?!?........ta da.....listed in reverse order:

        ******TOP TEN REASONS HIPPIES go to the woods,
        TAKE off their clothes & LEAVE THEM**********

10-they thought the clean up crew needed more clothes

9-they thought if the clean up crew didn't want them, the bears might

8-they figured the maid was waiting til the party was over to clean up

7-they believed it when someone called them a 'dirty hippie' and decided
they'd better get some clean clothes from the 'freeby' pile & leave
   the dirty behind.

6-they thought when they heard folks talk of "the mother" that she'd take
   care of it.

5-they're really into the simple life and figure the rains will wash the
   clothes, the air will dry them, the sun will bleach them and since the
   clothes were all natural fibers, they'd just become compost if no one
wanted them

4-they have never worked clean up and don't know how to clean up after
   themselves

3-they outgrew them

2-they took them off in the dark and couldn't find them later cause they
lost their flashlight

*AND THE NUMBER ONE REASON HIPPIES LEAVE THEIR CLOTHES IN THE WOODS IS*

1-because they can and they don't know any better