That's the confidence I like - "Follow me". Ha Ha
Since the OP was about desert and beach (I assume sand) driving - I mostly only do sand driving here, playing in the dunes. I put a Lokka in the front of my Trooper (Jackaroo) and it made a noticeable difference. We were out last weekend and my mate who now has the Trooper, I reckon was doing it easier than I was in the GU (4.8). We were looping doing a long hill climb (400 metres gradual slope to tight peak) that was undulating and needed to come at it with speed. It had a soft spot about 50 metres from the top and luckily hardened up near the end (or we wouldn't have made it). Lots of people underrate the Trooper and keep getting surprised when it keeps up. I think the Lokka makes a useful difference to this equation (the lower weight of the Trooper is definitely another real advantage in this situation). Watching it come up the hill the other day when it hits the soft stuff you can see it throwing sand on both sides. Before I put the Lokka in I wasn't expecting much difference in the sand, but thought I'd give it a go anyway. Was a good decision.
Because of the good experience with the Lokka on the Trooper I've bought a Spartan for the front of the GU now which I'll get in soon and then he'll have no hope.![]()
So, original question was: "Is a front locker going to benefit in desert & beach driving i have the factory LSD in the rear," - I reckon Yes!
I have no experience to comment on the front vs rear discussion.