I use a Ford Ranger Double cab and have a 2 man 650L system fitted. It takes the weight fine but the tank is custom made and only just fits. I have to put my poles on the roof. It drinks diesel like its going out of fashion.
All in all I'd say get a separate van and car. I got the truck as I thought it would be a good all in one but after 5 months I got a car to run as well as it's cheaper, and now wish that I'd got a van in the first place.
Simon.
Does look good though and people recognize it.