I was addressing leaks in the expansion tank rubber grommets on my 2wd 84
tintop while camping in the southwest desert and I saw my left front tire
is wearing poorly...the outside is wearing more... I've been aligning my
own vehicles for some time, and  I brought my 14mm Allen wrench with me.
   So, I knew the camber was too much and my toe setting probably wasn't
perfect, either...to determine toe in settings, I measured, tire to tire,
across under the van, and as I suspected, I had about 3/8" of toe-in.... I
dialed that back where I like it, to about 1/8"...
   Then to the camber, which I simply eye-balled by rotating the eccentric
at the upper A arm.   I do these changes carefully and little at a time,
especially since I can't  be as accurate as I like without strings, levels
and a good floor...
     Ahh, camping!   At least I get time and warmth to catch up with
deferred maintenance when I'm away from home...ha!