I do not own a 12v fridge, a Scepter can for fuel or water, dual batteries, an rtt, a winch, a fancy GPS, a laptop mounted to my vehicle, after market bumpers, dual swing out tire carrier, snorkel, roofrack with bolt on Hi-lift/shovel attachments, canoe, or a raft...
.. But damn, I wish I did! I still get out enough to stay sane with a system that works well for me..
2" super budget lift - spacer/shackle
Very aggressive tires, Load E deep tread - not even taller than stock
Rocker protection - a Must
Aux lighting - For added visibility/safety
Rear mountaineer rack - 2x's the storage capacity
Old fashioned plastic cooler and ice - can't beat the price
Garmin handheld GPS - not even the color screen, but it gets me there and back
CB/HAM radios - can't go without communications - Bought the HAM used
SUV air mattress - beats the foam pad i've always used
Bottle jacks, 50' & 20' tow straps, jumper cables, tool set, spare fluids, TP, tire iron, and a Hi-lift that I always leave at home because i've never once needed it.
I'd say if there were one that that I were to do next it'd be a custom bumper. Most likely a rear bumper due to the possibilities of configurations to store more stuff. OTH, a front bumper could end up being less expensive.
I can't justify an RTT since my wife doesn't camp. I can't justify a fridge - other things would come before it. Snorkel is cool, but, well it's cool looking - They'll around $400 for the Xterra..
If I had to guess, i'd say that my HAM radio is the only "expedition" gear that I have.. I bought off a guy on Expedition Portal.. I'm still not entirely sure what "expedition" gear is...