True. I know the bike carrier my neighbor has is a 4 biker. We've put my BigHit DH and two other beefy bikes on there with no problem. You just can't go wrong with a bike carrier, and the swing away version can swing either left or right (right for our left swinging tailgate).
There is no WAY I would be able to fit the BigHit in the back with the seat folded up, but I did put my Giant XTC NRS1 back there when I had it.