After 17 years living in a caravan park and watching 100s of people muck about for 10 to 30 minutes backing in beside a slab, it is probably time to pass on my tip.
Here goes.
BACKING your van in beside a slab is EASY
My Tip of the day
(A) Measure the over all width of your van tyres from outside to outside.
(B) Get your hands onto a piece of rope about 8 Ft to 10 Ft long.
(C) Lay the rope on the ground the same distance as (A) from the slab.
(D)
Now it is a simple exercise to back in with your Van wheels on to the rope, looking out of your drivers side instead, of trying to follow the Mrs confusing signals on the passengers side.