Need advice on winter tires can you help me?

First winter in Alaska. My jeep has been doing well with snow I have it in 4 wheel drive, so far has not been too bad, but I can tell my tires need more grip. Been thinking about putting some weight in the back too, as right now I have the back seat down to throw ruck,gear and other random stuff.

I plan on getting a set of tires for winter – OR Blizzaks only problem is they don’t have in any stock right now of Blizzaks and would prefer to get this done ASAP.

http://www.youtube.com/watch?v=sb0Yne0fhss

http://www.tirerack.com/tires/tires.jsp?tireMake=Firestone&s_kwcid=TC|21263|firestone%20winter%20force||S|p|6698896573&tireModel=Winterforce

I’d like opinions on the tires and also whether to get studs in them or not?

Will extra weight help? If yes how much should I look to add?

Also any other advice or tips?