From what I've read Madasaman, as long as you have a single axel and a motor mover, they aren't that tricky (though they can be time consuming)
Without a motor mover they are almost impossible because the wheel has to line up perfectly.
Apparently with a twin axel, they are even worse, and some people on these forums mention they only fit one Alko wheel lock purely because its so difficult to fit to both wheels.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets