I'm a GMC/Chevy guy and I concur with the full size Ram. The new generation is awesome, complete with drainable water cooler/ice boxes in the crew cab foot-wells. Save up your $$ and get the Ram Power Wagon, then you have your e-lockers, winch, electronic sway bars, and protection all ready added. Think of it as a Jeep Rubicon, but a truck!
I have a 2011 GMC 2500HD with three kids and we love it and have plenty of room for the kids, but the approach angle is garbage because of the MPG-friendly front bumper. You'd have to dump quite a bit of money into it to make it really trail capable. So right now it's essentially a trailer-puller and we explore in the Disco 2.
If I had known about the Power Wagon, I would have got it no questions asked.
On another note, there was a recommendation to get a diesel because of a 90s power-stroke that got 300k. The modern diesel is quite different from the bullet-proof Ford 7.3. They are more powerful and awesome; no doubt, but honestly, I'm not sure I would recommend them on the trail. I was considering trading my 2500HD on a 2014 RAM dually with Cummins for a slide-in camper and tow the disco, you can get darn near $15k off of MSRP when ordering a RAM diesel, and the "stripped" versions are actually quite nice.
Back to the diesel, they are awesome on the highway, but the new Urea injection requirements and the fact the particulate filter needs to regenerate (temperatures over 1000F) by burning off the ash isn't necessarily "trail friendly". True, they have computer chips that don't go into regen mode until you are over 55MPH (sometimes happens on a dirt road), but if you were driving below 55MPH on an extended backcountry trip, the computer would limit yoru power to a crawl until you could free up the filter.
That and I've seen quite a few people who have needed to replace this $1k+ filter every 60k miles or so. And this filter is NOT included in the 100k power-train warranty by any of the big 3 (so all of the big 3's engineers say you do NOT want to warranty this filter that long). That says a lot.
What also says a lot is the blue-tech diesel in the RAM 1500 is only warrantied out to 60k miles.....every other engine in Chrystler's fleet is 100k (even the big brother Cummins) but not the blue-tech.....hmm....something to think about.
So; in short, simple to work push-rod hemi-V8 equipped Power Wagon for the win!