Your Lombok shots look amazing, it is my wife's favorite island and I really would love to explore it in a Rover.
Have you been to Timor Leste yet? I spent some time there a couple of years ago, it is also a very cool place, it still has the original Portuguese roads made of crushed coral from hundreds of years ago, and there are some roads around the seasonal lake in the east, close to Jaco Island, that have lost their bridges and are completely overgrown, it would be interesting to try to follow that old route and look for the ruins of the original Portuguese pousadas and ranch houses in that area. Lots of untouched old WW2 caves and structures to explore in the mountains there too.
I think you can barge your truck in direct from Surabaya or from Denpasar, or go overland from Kupang, if that is an easier ferry.
Please keep posting pics of your trips, they are wonderful to see.
Cheers
Ray