Some excellent posts!
We Off the Grid Boondock and most of the time remain hitched. We camp AT the area we want to explore. Finished 4373 miles of OTG Boondocking and some truck/store parking lots when buying supplies and spend the evening.
Occasionally we will unhitch if we expand our interest in an area and use the tow vehicle to explore the area and possibly discover other OTG Campsites that we can take the trailer.
Often the staying hitched at a site chosen is NEVER LEVEL when in the Forest, Deserts or Mountains. Parking lot overnight camping will be an example that they are never level... flat yes... never level. They are graded to drain water. Our RV Garage IS FLAT... but grades downward to drain water out of the garage by code. The power jack corrects the one inch or so to be just... perfect.
An inch or two, front to back, have the BED upgrade.
An inch or four... leveling blocks from left to right. An inch... it will make little difference... although the Bathroom and/or Shower door may open/close when not latched.
Chock your trailer tires, as well if unhitched. Chock your trailer tires when the grade is a few inches or more and your tow vehicle parking brakes in either situation.
Some campsites, commercial or OTG... were not intended to be useable. WE can take an area, visually spot out the best spot and make do. It is a SKILL SET after years of experience.
All of the other details are subject to each individual. Your TOW Vehicle and be on the slope and the trailer is LEVEL. Visually... not so, but with the leveling bubbles on our front and side... perfectly level Airstream!!!!
Your AXLES on your trailer position is what you watch. Leveling blocks (set of ten at least in a package) can handle almost any situation that appears to be FLAT, but not level.
You will be amazed that your front is high, your rear is low but the axles are sitting in a spot that has the unlevel ground apparent... but your tailer is perfectly LEVEL.
The learning curve is quick and your eye will pick out the BEST campsite at a RV Park or Off the Grid pullout.
The MOST IMPORTANT skill of checking out a possible camp site...is to walk it first. You will discover that once you pull the trailer to this camp site... the road becomes... worse. As you walk the potential turnout... toss rocks, obstacles and make note of tree branches and rocks that cannot be moved.
Eventually you will be able to glance at a Service Station and KNOW which pump, how to avoid poles, signs, parked vehicles and how to exit in less time that it took you to read Three Weeks and Six States title. Have fun. At first it appears impossible... and eventually one glance and it is a NO GO or That is the Spot!