welcome
first and foremost, the most important thing is dont go out on your own, if things go pear shaped you have back up.
carry basic recovery gear, snatch strap and rated shackels to start.
uhf - in car or handheld
tyre pressure guage, to help in lowering pressures.
air compressor, to re-inflate tyres.
alot of places at tyres will do, but muddies would help.
maps of where you are going.
get to know what you and your 4wd is capable of, a 4wd training course is a good idea, a lot of clubs provide this.
but most of all , have fun