Having caravanned for around 20 years with the Awning travelling in the van and often 5 Bicycles. I can't see what the problem is apart from when you want to use the van on route.
Don't take to much clutter Crispy, if you are travelling abroad to the sun you don't need half the wardrobe with you. Nor do you need enough gear for Raymond Blancs kitchen and restaurant.
There are super markets and laundry facilities all over so you don't need to stock the van for a siege ;-)
Many put bikes on the roof or on cycle carriers, the extra drag due to wind and the creeking and drumming noises can be wearing and worrying.
Apart from tow hitch weights, many rear cycle carriers pose other risks. I've seen cars bikes and caravans damaged when turning corners. Many of the nylon straps and hook systems used "relax" and loosen a few miles down the road. I've seen two bikes go under a caravan, also bike being dragged between car and van in varying positions. I've also in the past year managed to stop two BMW drivers in a 3 series and 3 series touring. Two ladies and kids in the "touring" were angry until I showed them the hanging lower straps and pointed out that as they drove along at 70 the bicycles were flying held by two small straps and the car had been damaged and the rear window cracked. The other was on the M40 and the guy caught on to me pointing to the rear of his car and followed me into the services. At first he was angry as all looked well at stand still. He then saw the damage to his pride and joy from where the bikes lifted away from the car at 50 mph plus and twisted side to side in the wind causing hundreds of pounds of damage.
I've seen far to many other bike rack incidents to mention.
Keep what you carry to a minimum, I've always taken the new van to a weigh bridge with the intented load and with three Caravans have managed to carry Awning, Bikes and families gear and keep within considered safe limits.
If you have to use a rear of car cycle rack, buy QUALITY! Not flimsy polyprop webbing jobs with small hooks that go onto plastic bumpers and have flimsy plastic strap adjusters.
If you then intend to travel with the bike from campsites when the van is parked you need a lighting board with another license plate so that lights and registration plate is CLEARLY visible.
Have seen M40 and M1 police pulling drivers with rear lights and plates obscured by cycles on racks. Some M Way service ways have warnings about this!
Our continental cousins seem to carry bikes on quality carriers in general and with extra lights often as an itegral part of the rack. I therefore assume that continental police will take a dim view of obscured lights.
If you have to put the bikes on a rack, please stop a short way along the road to check the fixings and
regularly on route
