If you haven't already driven with one, I think you may be surprised how much steering you get with an E-locker. A couple of times I've been on hills requiring 'commitment' , with rock steps, & twists & turns. Switched on the e-locker at the bottom & just drove up & around the twists & turns. Not the sort of terrain where stopping to switch off the e-locker was a consideration, especially with the Tvan in tow!
Something I did learn since we've been away was in very tight stuff where maximum tightness of steering was required, was to change to 2wd to get around the obstacle in question. I suppose most people know that, but I'd never been told , or read, to do that. The leaf sprung GU utes do have a significantly larger turning circle than their coil sprung siblings.