I tend to get the van in position first either by reversing it onto the pitch with the car if there's enough room or use the motor mover.
The next part can change depending on which side needs levelling but you'll hopefully get the idea.
I get the wheel lock lined up as near as possible (I only tend to use one lock out of the two) and I lay the L'n'L adjacent to the wheels that need raising but making sure the L'n'L is set so that the wheels will be in the centre of the bags (Plenty of length and width on the bags too) even when inflated. I then move the van forward or backwards depending on space around the pitch with the motor mover so that I can then slide the L'n'L to where the wheels were situated previously in order for the wheel lock to be aligned. I move the van over the L'n'L making sure it's straight and adjust to suit the wheel lock receiver and lock. Handbrake on, wheel lock on and I start to inflate the bag checking the side to side levelling and adjusting the jockey wheel for front to rear levelling. Easy Peazy!
Once the van is at the correct height, disconnect the compressor and pop the valve cap on. Carry on as you would with the winding down of corner steadies and then open a beer.
Hopefully this uploaded photo works on this forum but as an example here's our 2015 Cartagena at Grafham Water back in July 15