Never stay alone at rural abandon campsites unless the owner of the campsite lives there.
While travelling just use common sense and listen to what your gut tells you.
Main Highways are usually board but faster in distance, secondary highways through towns are a bit slower to travel but more scenery. Hitch-hikers I wouldn't prefer unless I know the person. For the rest others have giving good advice.
I have stayed in the LA area on a super market parking lot............well 3 times they tried my door...............They heard the dog bark, but we wouldn't be a match to look in the hole of a gun. Now I always surround me with other campers or truck stops.
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-6500 lbs.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO 'Forever Young @ Heart' provide on their travels Music Entertainment to Senior Care Homes