If your wife and or son can drive then you should be able to simply nap and
take turns at the wheel.  I don't worry at all about your "20 year old
vehicle" on this trip as I'm sure it is up for it, but I do worry about you
and your family.  Nothing like staying up all night if you want to feel
groggy for a few days.  Is it really worth it?

Although it is unsafe I've pulled the driver rotation off in westy's by
letting folks sleep in the bed when they weren't driving which works great.
It is also a sign of how much things have changed but in the early 80's I
can remember my parents putting my siblings and me to bed in our 74 westy on
long, late night trips.  It is a nice place to sleep with the motor rumbling
below you as you gently get rocked around by the van's movement.  It is hard
to sleep though if you aren't on highway/interstate.  I can't imagine what
would happen in a crash though,, very bad indeed.

Jonathan Poole
'83 ac westy