Here's one option.  I followed someone else's invention
and made a strudy platform that bolts to the table leg
behind the driver's seat.  the TV is then affixed
securely with double bungie cords.  I also put screws
in the wood platform (with the heads protruding 1/4" or
so) to make it so the TV cannot slide on the platform.

http://www.concentric.net/~Sxs/TV.html

You have to be very careful.  If the TV became
dislodged in an accident, it could act as a missle and
seriously injure or kill someone.  It can be done
safely, you just have to do it right.  Ours is very
solid.

Hermann the German wrote:
>
> Dearest Listees!
>
> After five years of traveling with kids and keeping them entertained the
> old-fashioned way, we finally broke down and bought a TV/VCR combo. The
> question now is: where is the best spot in the Westy to set it up while
> driving? Between the front seats, on top of the front table, the side flaps?
> I know some of you travel with kids and have used a combo. Help me out here
> please.
> Cheers,
> Hermann de Boer
> Kansas City,Missouri
> _________________________________________________________________
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