Going off road means things are going to get bent, loosened up, and need repair. It would get expensive fast if you had to take your truck in for alignment every time you worked on the front end.
While camber and caster can be adjusted on most vehicles, there is not much adjustment for camber on solid axle trucks. While caster can be adjusted either with control arms on 4- and 3-link trucks or with leaf spring shims on leaf spring trucks, toe is sometimes hard to adjust without help or a special tool.
Most vehicles are approximately 1/8-1/4" total toe in. Low Range likes to run about 1/8" toe in to avoid tire wear since incorrect toe is the major cause of tire wear on any vehicle.