You essentially have five lift options:
1) Body Lift
2) Shackle Lift
3) Spring Lift
5) Combination of the above
#1 will let you fit bigger tires, is the cheapest, but won't net you any ground clearance. You won't have to worry about drivetrain modificaitons at all. For you, this might be a good option. Don't go over a 2" body lift.
#2 Will let you fit bigger tires, is cheap as well, and will net you a little more ground clearance. You may notice some steering/handling issues after installation of this and should probably get wedges to shim your axle back to the right location afterwards. Do not get shackles that are over 2" longer than stock.
#3 Will let you fit bigger tires, but are typically not cheap and require lots of mods that sometimes include drivetrain mods (typically lifts > 4"). You will notice a difference in ride, handling could be affected. For your needs, I wouldn't bother.
#5 Is a possibility for you. I'd go with a 2" body lift and see where that puts you...if it's not enough maybe get a small shackle lift to accompany it.
Again, since you're not wheeling it any - these are my recommendations. If you were wheeling it, they'd be much different.
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