Who gives a shit how much stuff he wants to take with him. Or how little you can get by with. The guy needs solutions here people!
With 400 HP you should be able to tow a nice little trailer full of gear.
Edit:
Does that Volvo use the same stupid 2.0 engine as the xc90? Because that would already be the solution if they'd put a real power-plant in the thing. I wonder if the hybrid version is any good...