For greenlaning I usually take 1st aid kit, fire extinguisher, maps (just in case!) mobile phone with charger (and with credit on it) and food/drink for prolonged period of being stranded. Reasonable tool kit, torch(es) warm/waterproof clothing.
I would most likely have these item secured in the boot for a pay & play too - still got to get to/from the venue.
May sound boring but it is reassuring.
Kodiak Transglobe 2.0 SWB
Bricks are the knowledge you are taught,
the cement is the experience you gain that holds them together.