i'd never let them take the van home overnight.
i have had a couple of people applying for jobs asking if they get to keep the van, and have had a WC of mine ask why i dont let him.
i dont pick them up or drop them off either. another waste of time. if they cant get to work on time, they aren;t the right people for me.
i dont even let them keep the van keys overnight. they have to pick them up off me every day. had too many jokers leave and not give me the keys back quickly, trying to hold me to ransom.
much better to start from day one and never let them take the vans home, then they know where they stand. employees don't like loosing benefits (who would?!) and some will resent it.