Yes, a 4x8 sheet will just fit. Lay the back seat down. You'll have to slide it in at a bit of an angle, and have some cardboard to protect your interior. 

Karl Wolz
Sent from my electronic umbilicus

> On Aug 26, 2014, at 2:52 PM, Dave Mcneely <mcneely4@COX.NET> wrote:
> 
> Yes, if you cut it into two 4x4' pieces.  then you can put it in through the sliding door.  mcneely
> 
> ---- Jeff Palmer <jpalmer@MYMTS.NET> wrote:
>> Van is at home! Anybody know if a sheet of plywood fits in a westfalia?
>> 
>> Thanks
>> Jeff
>> 
> 
> --
> David McNeely