Newbie looking for swaybar advice

Typically you will want to replace them in matched pairs. As to whose, I'm not sure. I understand the roads up there are pretty rough so I think you are doing the wise thing by sticking with the stock springs, ride height, etc. I'd check with Kenny Brown or Griggs, etc. and see what they recommend for what you are doing. No point in guessing if you can find someone who can give you real information.