Hello. I recently bought a T5 multivan and plan to travel with my family as well. I have spent quite some time looking for the right drive-away awning to suit our needs (6 persons total). I ended up buying the biggest tent available from outdoor revolution. Oxygen movelite kombi. Which is a blow-up tent with a 5 person sleeping cabin and plenty of room. Bear in mind though that since this is an English tent, it is designed for attachment on the left side of the bus and may not be suitable for the right hand side. To be fair I haven't had a chance to pitch the tent yet so although it seems to be good quality I cannot provide an actual review yet. Hope you can use it for inspiration at least.
http://www.outdoor-revolution.…elite/movelite-kombi.html