OK here's the big list of all the suggestions I've been given, alphabetized to help sort out the duplicates. It's crazy long and of course depending on the type of exploring you’re doing not everything’s entirely necessary. The list covers everything from a light day ride to really back country stuff miles away from anybody. Long list but probably still worth a read through.
6" socket set extension
air compressor (batt powered) or high volume manual pump
air pressure gauge
ammo boxes to keep everything dry
battery - USB for phone
battery pack for atv (Antigravity) (Peak booster pack fairly cheap)
boots
bug repellent
bungee cords diff size
camera
can of baked beans
can opener
carabiners - 2
cell phone charger
cell phone in a ziploc bag
channel locks - the big ones (my blue handle ones)
clevis to attach to a pulley to a tree with tow strap
CO2 cylinders (3) or can of fix a flat
compass
cotter pins
crescent wrench
D rings
dry socks
electrical tape
fire extinguisher / fire extinguishing materials (prob lighter and smaller than a whole fire extinguisher)
fire extinguisher
fire starter stuff – alternatively some fine steel wool and a 9v battery
first aid kit (simple)
flashlight
food - cans
fuses - spare
garbage bags 2
gas – 2 gal
glasses - extra pair of Rx
gloves (light leather)
goggles
gorilla tape
GPS w/ extra set of new batteries
hammer - small
hand cleaner
handgun
head light bulb - spare
helmet
hex keys
hooded sweatshirt
ibuprofen
key - spare for ATV
LED light bar
light – black diamond head light
light sticks
lighters - two
multi tool
multimeter
needle nose pliers w/ wire cutter part
newspaper for fire
paper map of the area
pepper - just regular table pepper about 5oz or more - plugs radiator leaks, blown head gasket
pepper spray - bear
PLB - persona locator beacon (satellite)
pliers
pulley for winching
pulley block
rain clothes
ratchet straps (2 small like my camo ones)
recoil starter
relays - spare
rope (poly - at least 50 ft)
saw - folding
screwdriver - multi
shovel - small fold up
side cutters ?
silicone rubber tape
silicone tube
small saw
socket set - 3/8 and 1/4 drive, or a 3/8 drive w/ 1/4 adapter – largest socket is a 3/4
space blanket
spare belt for a CVT drive
spark plug + gap tool
spark plug socket/wrench
spray bottle of soapy water
T25 and T15 drivers
tarp (small for rain events)
telescopic magnetic pickup tool
test light and volt meter
tire plugs - twice as many as you think you'll need
toilet paper or wipes
tow strap
towel old
trunk on back rack to carry everything
universal tool kit like...
https://www.channellock.com/39100-unifit-socket-set.aspx
utility knife w/ spare blades
valve stem tool and spare caps
vice grips - a 4in adjustable and a 12in adjustable
water – lots bottles pre-frozen
winch
wire - electrical - 10 ft of 14ga
wire (bailing) - wire spool – (snare wire) (mechanics wire)
wrench adjustable
wrench to remove axle castle nut - in case you break a drive shaft
zip lock bags
zip ties 12'-15'