it depends on which model it is.
85 -91 westys with the rear hatch panels that have the plastic clip heads
hidden under the vinyl, are a breeze to remove.  just use a "pigeon toe"
doorpanel clip remover..  looks like a flat bladed prybar with a fork in the foot.
insert fork around clip and pry up.  might want to used a rag to keep from
scratching the paint around the perimeter of the hatch panel. 80-84 westys have
exposed heads,but the clips are different than the 85-91 clips and you can
actually remove the clips and save them..

on the passenger vans and carats, with the exposed head clips are a PITA.

on passenger vans and the wolfsburg and carat with the hatch panels with the
exposed head clips -forget it.   just snip the heads off with wire cutter
snips.  if you try prying them out, you'll damage the hatch panel.   the clips are
a one-time-use only deal so dont bother trying to save them..
try prying one out and see what happens...

chris