They are massive inside! I had a VT wagon. Not sure about the 12 tho, never tried it

I did fill it with about 30 shortboards and mini mals once, was amazed they all went in

They are good for a big fella like you as well as the front seat goes miles back. Im 6.0 tall and the seat had loads of adjustment.
Good thing about that model was that it had roof rack fittings ready to go so you just needed the cross bars.
Hope that helps