Do you need a van? Yes, they are dead handy for carting things around, but can limit you in other ways, eg carrying more than one passenger, although I know you can get some that do. Some local authority tips need you to register your van before you can dump stuff as well.
I have a van for transporting a tandem, and I have access to another car, but if I had neither tandem nor another car, I'd get an estate.
That said, vans are great to drive giving a high up view and they are roomy in the cockpit. Other road users treat you differently as well.