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 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
“Anyone who believes in indefinite growth in anything physical, on a physically finite planet, is either mad or an economist.” -- Kenneth E. Boulding