Can anyone help me out with a 4WD SUV rental for Alberta, late-December - 5 days total?

The best I can come up with is J626300/D005297 which comes to $280 but the protection coverages and surcharges are killer... they bring it up to almost $580 total!

I'd really like to not spent more than $350 on this rental if possible. Are there any coupon codes that I could pair with this to knock the rate down, or perhaps a better code is available for Canada?

My dates are 12/19-12/23 and a larger 4WD vehicle is necessary as I'll be taking it through the Rockies.