A few years back we were camping at the shore when neighbors showed up after dark. We were sitting around the camp fire and I was trying hard not to be that guy that just has to help. They got their 5th wheel backed in just fine. But watching these two ladies make multiple attempts to unhook and having nothing but problems, I finally gave in and asked if I could help. They were glad to accept my assistance as they thought they just were not strong enough to pull the pin.
So I proceeded to give them a lesson. I said, first thing you need to do is put chocks under the wheels. They looked at me funny. I pointed to my trailer wheels. Apparently Canadians call them "stoppers". They put their stoppers in place. I then had the driver get in and back the truck up against the pin. And to make sure they knew they could do it, I had the other one very easily pull the pin. Yes, they already had the legs down. They were very grateful as the back of the site sloped right into the lake. And the way they were going, that was where their camper was going to end up.