Front Seat Bed - PetDek for our (human) Grandson?

Thanks for all your ideas! The air mattress idea works with pillows and containers to fill in the gaps. The person who posted this picture said he used his table top to bridge the gap between the two seats.

Those seats are pretty narrow for sleeping unless you fill in the gap between the seats and the dashboard. Our little guy would probably fall out if we just used the seats. Or maybe falling out of bed is part of the fun camping experience. :D