When camping, absolutely not. Front wheels off may be OK, but it's a long way to the first step on the stairs. Back wheels off, no parking brake!
On the other hand, when parking it for the winter on a level lot, I'm considering just off the ground, lifting it with the jacks, then putting heavy-duty axle stands under the frame immedaitely next to the jacks and retracting the jacks.
The jack manufacturer says not to leave the jacks down without frequent anti-corrosion procedures (wipe down the exposed piston rods with silicone fluid every week) if you're parked "close' to salt water. They define "close" as within 60 miles. We're about 60 yards, across the street from houses that are on salt-water marina waterfront.
Frank and Eileen
No longer RVers or FR owners