D
dim_bulb
Just get a sticker saying no tools left in this van overnight like I've seen on so many vans because that will deter them.
Give it a year with one of them and you'll be wanting a bigger van again! Just bite the bullet and go for a Vivaro, or, if you can afford it, a VW Transporter.
If this is out of the question however, I'll throw another into the mix; Ford Transit Connect. Good vans IMHO