i'm not sure about that tow... i think you'd be better off with a
flatbed.  i'm pretty sure it says in bently how many miles the van can
be towed with the rear (drive) wheels on the ground, and i'm pretty
sure that the max number is somewhere around 30 or 40 miles.  i think
this has to do with transmission lubrication--with the tranny in
neutral, the input (engine) side will not turn so the gear oil will
not be distributed around the tranny for proper lubrication.

also, the fuel pump will only run for ~5 seconds with the engine off. 
you will need to pull the relay and install a jumper to run the pump
continuosly.  this procedure is documented in bently under fuel
injection system tests in the section regarding flow volume testing of
the fuel pump.

Ben.