When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Limited slip or lockers are good news/bad news. You get both tires for traction, but if you slip both tires, you will be sideways quicker.
If back in snow country, I'd keep a separate set of studded snow tires, and would probably go for a locker or limited slip. An air or electric locker that you could use only when needed might be an idea, but get your checkbook out.....
If you do decide on a limited slip, the Power-Lok is a tighter more effective limited slip than the Trac-Lok.
I have a Power-Lok in the front and a Trac-Lok in the rear of my Bronco and wouldn't want to be without either of them, unless it's to change to a full locker or selectable locker. The Trac-Lok is very mild on the street. I don't even notice it in the Bronco on the street but it does help off road.
I have a LockRight locker in the rear of the F350 and that one I do notice on the street. It will break the rear tires loose easily on wet pavement a little goose of the gas pedal while turning and chirps the tires on dry pavement while turning as well unless I'm easy with the gas. I've learned to drive it without squealing the tires, just have to be easy on the gas. It is Very Effective off road though, I love it .
Yeah I have found the best things up here in washington are showtires/studs and about 3-400lbs of sand in the back of the bed That usually keeps the rear end planted quite nicely, now stopping the truck is a whole different ball game.
On packed snow, a set of studded snow tires should do the job pretty well. In deep snow, start with snow chain/cable, and if that's not enough get a locker or LS rear end.
Back home, we used to have about 200# right in front of the tailgate. This, combined with light throttle worked pretty good. A locker will give traction to both tires, but can make the back end come around pretty quick. A 250 is pretty long, so it might not be as bad. I would't recommend a limited slip because they are marginally better than open, but cost a bundle just like a locker. My recommendation is to try weight first, then studded tires and weight, and finally a full locker to all that if you still aren't satisfied. Remember, going better still doesn't help you stop or steer better. Have fun in the snow