Couple things.
Spring wrap happens to any leaf spring, doesn't matter how thick, only how much leverage you have and how much torque you transmit. There is no way, short of an anti-wrap bar to stop it. Even coil and linked rigs get wheelhop from axle wrap. Wheel hop in reverse is almost always worse because most springs are stiffer on the front half that the rear half. They are better at resisting upward movement, then downward movement. The longer portion in the back, is not stiff enough to resist the torque input. What you have is not that bad, considering you were hammering it. I'd rather have soft springs with a traction bar than stiff springs without one.
If you are new to wheeling and to snow wheeling, a few tips, although I'm just an amateur compared to many.
1st. There are no set rules in snow. What works at 6 a.m. may not work at 6:15 and what works at noon probably won't work at 8 p.m. or 2 a.m.
2nd, normally, wheelspin is not your friend unless you have to do it. Crawling with super baggy tires is much preferable with just enough momentum to keep moving . As soon as a tire starts to spin, it melts the snow and lubricates the traction surface. Once that happens, things usually go downhill unless it's hard enough to keep your axles out of the snow. There is almost never such a thing as too low of pressure in snow, unless you are side-hilling or the tire is falling off the rim or folding over on itself. Think finesse, unless you have to bash it, then, big tires and big hp is your friend, snow drifts are often an example of this, where they are rock hard and you have to hammer through them. Lightweight snow chains can really help with the crawling thing in snow like what you were in.
3rd. Lockers aren't always best. Side-hills and turning often cause problems for locked or spooled rigs.
4th. Light weight will get you a long way. Leave the full-sized, 8,000 lb rigs at home if the snow is deeper than a couple feet. I'm a fullsize truck guy but I've learned that a Toyota cut down, with an light weight, upgraded powerplant, gearing, lockers and big tires will make most big trucks look foolish. Cherokees, Trackers, Samurai's with more power and LS or aluminum Big Block powered toys can drive across things you cannot walk on.
5th. Automatics suck power, create heat and have their issues but they can idle away from a dead stop without spinning a tire. Stick shifts save power, don't overheat and give you uber-control but a grabby clutch or dumping the clutch overwhelms the traction you have a lot of the time and does nothing to get you further, but it does look cool and it can be a lot of fun in the right snow conditions.
6th. Never go alone, or without a backup plan. Tree wells, hidden creeks or rivers, flooded roads under deep snow, all happen. Bad things can happen in the blink of an eye. There are several youtube videos of guys trying to cross a drift and sliding down the side of a ravine or a whole mountain. Even happens to snowcats, so have a plan.
BTW, nice truck.
