IIRC, the drain holes are in the lowest part of the floor pan, presuming factory rake. Any water that gets in the back should, theoretically, flow to the front foot wells and out the drain holes. Now, if you've altered the rake of the vehicle, YMMV.
Use those jerry cans to run a 2-3kw generator to charge it overnight. For example, if you use a Generac GP2200i, you can get 7 hours of run time using 1.2 gallons of gas while generating 1700W per hour (according to Generac). That gives you a total of 11.9kW (or 9.9kW per gallon of gas). Thus...
I'm looking at this rear bumper from Fab Fours: https://fabfours.com/product/jeep-gladiator-rear-bumper/
It may not have prevented the damage the OP experienced, but it looks like it should provide decent protection for the quarter panel sheet metal.
For those without the rear underseat lock box, how much space is there between the bottom on the rear seat and the floor if you take the plastic divider out? I'm wondering if a Pelican-style case would fit. :idea:
@JeepCares can you guys ask Engineering what the intended purpose of these elastic loops is? It seems odd that they'd be for rolling up the rear window since the manual specifically states the rear window and corner panels should be either all in or all out: