Yellow Chocks in post 40
My first year I had a set of those, and in a rush to get out of a campground before being charged $10 for a late departure, completely forgot and drove OVER them. Squished flat. Didn't feel them resisting at all. So much for stopping a rolling Airstream. Good thing the ground was flat. Those super cheap chocks might keep a jet ski from rolling down a moderate grade, but anything that weighs a ton or more... you're gonna have a yellow pancake.
I now have the orange plastic leveling blocks and chocks. Those chocks are STRONG. I've built the "Change a tire ramp, ending with a chock to stop the tire from rolling too far. Those plastic ones are HEAVY duty. I think the yellow leveling blocks have an integrated heavy duty chock. Look at the weight rating and construction before buying chocks.
Someone gave me a Hensley between the tire chock and it works VERY well. I use one orange pair on the other side. Both work well, but I notice in all the old WWII pictures that airplane chocks always had a pair tied together with a rope. Handy to jerk them free from the wheel without being bent over if they've wedged due to soft ground or the A/S shifting. Also you don't lose one somewhere in the back of the truck. I like the security of the Hensley or the other between the wheel chocks that can be locked. A real deterrent
in an unfamiliar campground.
Today is a gift, that's why they call it the present.