Towing with a camper van - any advice please.

whiteowl

Having had both caravans & camper vans couldn't decide which we prefered so have decided  best option is to get a small camper van to tow our caravan. Thinking about something based on either VW Transporter or Ford Custom Transit.

Anyone got any advice on things I will need to think about/consider?

Both would seem big enough to pull our van (MPTLM 1215Kg) but what BHP would it need to be?