I have a 1990 Chevy Conversion van with only 45,000 miles. She runs great and has a cozy queen size van bed in the back and three captain's chairs, including the driver's. It has a clean record and gets pretty good gas mileage for a van. You must have a clean driving record and a valid driver's licence plus you're own non-owner's driver insurance.
While it looks bad at first glance, it's really not too shabby a deal for both room and transportation. (The thought of having to sleep in the van parked on Mission Street, however, is a different tale altogether.) Have at it, street campers!