I had been driving with a cast on my right foot for awhile.What I have
found myself doing in your situation, is to put  my right hand on the
parking brake and pull up on this at a stop light.When I think the light is
about to change, I find the friction point where the clutch pedel starts to
grab(while the parking brake is on). The light turns green , and I
simultaniously release the parking brake and continue to let the clutch
pedal out.Away I go , even on the steepest hills.Works real smooooth.I
drove big stick shift trucks for years, but still needed to do this, and
even do it still sometimes. The clutch is so weak in the vanagon. This
reduces clutch chatter.