XCA's were the tires that got me most of the way back to WA.  I got
lucky and found them in a Tire store in Whitehorse.  They were awesome and
would be my first choice in 14 inch tires for the trip.  They are 8 ply
rated and the load rating is something like 2200-2300 lbs.  Their tread
pattern blows for driving in snow, the rest of the year they were great.
They showed almost no wear after 25K miles.
     I would still prefer 15's as they are easier to find, but XCA's would
be my first choice (of the tires I've driven on - 6 sets) for 14's.  It is
recommended that you have 2 spares (I, being smarter or cheaper than the
recommender, only had one).  One rock destroyed the front and then the
back tire on the pax side.
     It's an awesome trip, go for it no matter what tires you have.

John
87 Westy SVX