I am moving from Toronto to Washington DC. I might want to rent a cargo van to move some or all of my stuff.

I don't necessarily mind renting in Washington DC, driving to Toronto, and back. I can rent a minivan for two days for about $200, and I think most major car rental companies allow you to go into Canada. But I'd prefer a regular cargo van.

I know almost nothing about minivans, but the Dodge Caravan website makes a big deal about how you can stow the seats and maximize storage space. Is this true of most minivans, since I won't necessarily be able to pick which one I get?

Are there any better options for one-way? I'm guessing not, but I don't know that much about car rentals.