We have never had levelers and really don't want them. Why? Cost, weight and one more thing to maintain and have problems. We have always used the Lynx levelers Ron referred to above and I cut a nice set of 2x8 risers capable of lifting the whole rear of a E350 or E450 over six inches. There are a lot of accessories I had rather spend my money on like solar, good backup cameras, nicer interior, etc.
We almost always camp in NF, BLM and CoE campgrounds and a lot of them are very unlevel. The Lynx levelers are about $30 a set at Walmart or Amazon and I carry several sets. We recently spent a few weeks in a remote spot in the mountains of NM and I had five inches to level front to back on one side, three inches on the other and it was no problem at all with the Lynx levelers. I have two sets that are probably ten years old, have been used a lot on dirt and gravel and still are just fine.
Think about this: you can buy a side and front to back bubble level to determine slope for less than ten bucks. You can buy two sets of Lynx for sixty bucks. You can cut 2/8s for twenty bucks. Or, you can spend thousands to push a button.
Incidentally, we always level pretty exactly. Not just for the refrig but also for the shower. A slight drift to starboard allows the shower to drain perfectly. And we don't like to sleep with a slope to the bed. As to stabilize for blowing, that has just never been an issue for us and we have experienced a lot of windy campgrounds.
Just our experiences.
Paul
