I have been pulling 5th wheels for the last 10 years and have went back to a travel trailer. I am having a heck of a time getting it level. Seems I get it level disconnect get it level up and down an...
Level in our TT depends on where you measure. The floor, the bed, the stove, the frame.
We have a side to side level on the outside. We add one or two 2x12s under the low side wheels, then disconnect and use the tongue jack for front to back. Typically we like the tongue a bit higher.
Two or three days on anything but concrete or asphalt and it will settle.