We had the experience of 'moving' slightly rearward because the rear wheels were not planted firmly on the ground. We were at the American RV Park west of Albuquerque across from Camping World. We set up in their new section.
The lots are slightly slanted from front to rear with the rear being lower. I set the leveling jacks to come down and we were level. The rear lifted up, apparently, more than it should. During the night, we vibrated a little as we were 'every so slightly' moving backwards.
So, early in the morning, I started the engine and leveled on the air bags instead which firmly planted the rear wheels on the concrete. Unless we are on a level site, I always level on the air bags so I never have to worry about lifting the rear wheels.
If we had leveling jacks only, I would certainly use chocks.
I wished they had designed the new section where it was either perfectly level or the pull through sites were angled the other way so that the front would be lifted vs. the rear.
Safe travels,
MM.
Mr.Mark
2021.5 Pleasure Way Plateau FL Class-B on the Sprinter Chassis
2018 Mini Cooper Hardtop Coupe, 2 dr., 6-speed manual
(SOLD) 2015 Prevost Liberty Coach, 45 ft, 500 hp Volvo
(SOLD) 2008 Monaco Dynasty, 42 ft, 425 hp Cummins