I have used my 2013 in A LOT of sand. Both damp, on the lake shore, and in super hot, talcum powder dry terrain in the summer.
This truck LOVES sand. But, technique and experience will get you farther than mechanical aids. Let gravity, and momentum be your friends, a slight incline can make a huge difference.
The True Key, is to AIR DOWN! Anywhere near factory recommended pressures just creates a wheel hopping, jack hammering massive afternoon of frustration. Dropping down to 25 psi transforms the truck into a completely different and massively capable machine.
Due to running alone much of the time in very remote areas, I use the air pressure, low range, lockers, and lastly the winch as increasing levels of a sort of 'Safety Net'.
The 2013, with it's revvy 5.7 and 4.56 gears could get around nicely in 4Hi. When things started to strain too much, 4Lo would get me going. If trying to go into motion from a bad spot, 4-Lo with it 'all locked up' would work. I found that Manually locking the shift lever toggle down, limiting it to 2nd gear was best, providing enough wheel speed, and prevent the truck from upshifting, bogging, losing momentum and then downshifting and starting all over again. Lock it in where it will just use 1st/2nd then use your foot to modulate the throttle to keep it from bogging, or spinning up and hitting the rev limiter when you do break free.
That was with the stock wheels and BFG A/T's. I ran them at around 20 psi all summer, and never had an issue, other than a little wallow and heavy steering at low speeds on pavement. If I were to travel long distances at freeway speeds, or carry heavy loads, I obviously would air up.
I then went with a wider, lower weight rated General Grabber Tire, and they are outstanding flotation tires.
My rule of thumb is, if I am in 4lo, all 'locked up', and can still make more forward distance, than the rate at which I am sinking, I would just stay in the gas, and let the truck work.
Bottom line, DO NOT fear airing down! I haven't ever peeled a tire off a wheel, pinched a sidewall or had any other issues. Plus, with reduced pressures, you get that 'free' extra few inches of suspension travel in the form of sidewall squish, making for an absolute Cadillac ride!
Believe me, stopping to air up is just a very small price to pay when it comes to transforming the performance of your truck in sand. That 20 minutes of airing down and then back up returns ten-fold when it comes to all the time and frustration saved digging, yanking and winching when one is too hard headed to simply bleed some air off.