I agree with Rudy, deep snow is the only time I miss a front locker and chains help overcome that.
If you're hard core crawling all the time you'd need a locker, but you will break lots of front end parts either way. That is why I say ARB or open in IFS, anything else is wasted money that should be going towards a solid axle if you're seriously crawling.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein