bring compass, maps, your smartphone (if listening to music only have one ear phone in so you are aware of surroundings), power bank, and an EPIRB radio beacon
bring survival gear such as warm clothes, rain/sun protection, water, food, etc
tell someone you trust your plan and when you will be able to contact them
avoid camping near trailheads (where cars park for start of hikes) or road crossings to reduce chances of road drivers finding someone to rob - make it hard for them to find you!
consider camping near others you can seemingly trust - especially grey nomad couples are generally protective rather than predators
be aware of the safety issues of the hike such as wildlife (know first aid, etc), people (avoid areas where drug trafficking or growing occurs)
set up camp before it gets dark so that you are aware of your surroundings so you can be more comfortable overnight
if taking a drone be VERY careful of when and where you use it
they are NOT stealth and those in remote areas usually do not appreciate having their activities documented without consent
this is particularly the case with those embarking upon illegal activities such as drugs or hunting - they may kill you to get your drone!
the advantage of solo hiking is you don't have to stress about others - relax, eat when you want to, see what you want to, camp where you want to, etc.
leave no trace