Great pictures and video, that's my kind of Jeeping!
I like your navigation set-up- is that GAIA on the tablet? I just downloaded that app on my phone and was considering a subscription and maybe setting it up on a tablet. Also looked at ONX offroad, but think I like GAIA better.
Yes. That is GaiaGPS on my tablet and iPhone. I have different layers on each so I don't have to flip between them much.
I bought a used iPad Mini - 5th generation on Gazelle for $220.00. It is the LTE model with 256GB of storage. You need the LTE model for the GPS chip. I sync tons of offline map layers, 60GB of Spotify music, my Scrambler parts list, wiring diagrams and other things I might need off-grid. The wife can download movies and watch them offline too.
The third device is my Garmin InReach GPSMAP 67i. It is a full GPS and satellite messenger. It has the Garmin maps and I could load custom maps to it as well. When it is 110+ degrees, the iPad/iPhone devices will overheat and dim the screen, then eventually stop charging and then actually shut down. The Garmin is rock solid hot or cold so it's my true backup. Although we found on our drive to Silverton, when the iPad starts to overheat, you can pull it down and put it in the Dometic refrigerator for 15 minutes and then get 2-3 more hours out of it before repeating the process. My wife got good at that on our trip...