I am curious as to why you put the trans in 5th? I would think both in neutral would be fine.
I do agree locking hubs are too expensive for what you're doing. Think of it this way(in reference to front driveline) if you drove the jeep on this trip instead of towing it would have the same effect on the front drive. Either way the front axle will be free to spin due to the vac disco. Drive or tow the front is in neutral and would act the same regardless. No worries there.
84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?