So far, we have taken the no drilling approach of using the JC
Whitney curtains with suction cups.  That gets old the first time
they pop off when you're sitting on the porta potti.  :-o

The curtains came with snaps that can be screwed in (in addition to
the suction cups), so now I'm wondering exactly what's behind the
head- and side-liner (is it structurally sound) and how long of a
screw I can use.  The ones that came with the curtains extend about
3/4".

Alternately, we're thinking of sewing loops to the curtains we have
and using those black knobs wherever possible.

The other option, of course, is to find an interior with curtains and
retrofit the tracks.  I noticed the other stuff that Jim has, but are
the tracks available and how hard are they to install?

-Karl

'87 Vanagon GL Weekender "Beverley"; Trexlertown, PA
http://www.enter.net/~bloss/vw/
VW shop list: http://www.enter.net/~bloss/vw/vwshops