I've been a prep'r for much of my adult life. You will be pleased with the RZR for short term bug out.
I set ours up for long runs with a mind toward overnight stay. Just got back from western Wyoming where we rode 300 miles worth of wilderness trails in the Bridger Teton national forest. I was completely confident, if we had a problem, we'd be fine for a day or so. A day pack will fit between the seats & we carried extra provisions.
Lots of nooks & crannies to tuck away "stuff" and still have it reasonable secure while on the move. Always keep water on board.
Under the driver's seat - Nalgene with water, MRE, small peanut butter jar with lighter, spark plugs, wire, zip ties and other things.
Additional tools rolled into a tool pouch from Home Depot & it all fits in the glove box. Small peanut butter jars again - toilet paper, feminine hygene products, USB charger & cable, compass, another lighter (2 is 1, 1 in none), paracord, '*******, multi-tool.
.
Just enough room behind the passenger seat for a compact shovel. Alternatively an e-tool can be secured there too.
I added a 3" tube to the back of the cage. It holds a cab cover my wife made from an old tent fly.
This Home Depot "otter box" fits nicely under the hood. Note also, a spare belt & Fix A Flat is zip tied to the frame in there too.
A couple things I will add - what we learned on the Wyoming trip and from a wet ride in the upper peninsula - a 6'x10' tarp and rain ponchos.
I will be adding a FuelPax or perhaps a Euro style Jerry can for gas. Strapping a gas can to the back cargo area just isn't good enough.
I recently bought a Midland Backpacker folding 12ga. Handy to have in remote wilderness when you are not always the top predator or to add items to your diet. An AR and 10/22 Takedown will mount below the roof too. :wink
Lastly, my wife is a trooper. She and the little foo foo dog enjoyed an MRE picnic at 8800' elevation above the Hams Fork River basin.