I agree with all the previous posters and would add that you need to know the hitch weight rating, trailer tongue weight and trailer tongue weight rating for your van.
I tow a lightweight category travel trailer (much bigger than what you describe) and find that the van makes for a good tow vehicle. I use a weight distribution hitch and my van has added rear airbag suspension. It is all very stable while being towed.
van with trailer.JPG
For security, if leaving the trailer unattended at campsites, you can purchase a hitch latch lock, and/or lock that blocks access to to where the ball goes and/or a wheel locking device.