We had a mover fitted, which is fine for one of the wheels, but the chances of having the second one line up at the same time was never going to happen.... required jacking up every time.
On a personal note, re the advice of fitting one lock and dragging the van to line the other one up. Don't be tempted, especially if you have alloys fitted.
Over any holiday period on a pitch that is anything but perfectly level, the van will settle slightly and this ended up marking my alloys, at the points where the foam pads on the Alko lozenges were crushed beyond being useful.
IMO dragging 1600+ kgs of twin axle against a locked wheel, can only result in more severe marking of the alloy wheel, along with untold stresses against the threaded securing bolt.
If your pitch was uneven "sideways" and either side of the van needed to be chocked up, this would cause further problems.
Each to their own, but I'd stick to jacking the van up.