Trailer tires are a concern. There is a big controversy over ST vs LT tires on trailers. My trailer has Goodyear marathon ST's, 15 inch D's. all the stories of blowouts on newer ST tires scares me. I am thinking of at least taking one extra spare off rim. I am thinking of going to Michelin 15 inch LT' E class (yes you can get them), I may buy 2 and carry them off rim. Mix & match is not a good thing, but at least it would get me across the border. Seems a bit silly to change out 4 new tires without gettingn at least one season in. Maybe i should just bite the bullet, chain the old good years together and put them in pickup bed as spares.