By the way, this is my daily driver and I don't do any crawlin'. I take it out to go hiking, camping, hunting... and sometimes get into some tough situations.. but not much. I'm really considering the Detroit EZ Locker now.
To add to the above stated the only thing I find annoying about being constantly locked in the rear is sharp turns cause vibration. My solution is always turning with the clutch in or in neutral. The binding actually blew out my yokes on my driveshaft. It also takes a bit of your fuel economy away being constantly locked but it does make a difference when you ever nned it. I would suggest if you are going the locker route do it at the same time you are doing new ring gears this way you only pay once for labor...