We stayed at Hi Country when we were in Whitehorse making repairs too. We had two flat tires on the rear of our truck on the TOTW Highway, but managed to make it to Whitehorse on some multiple-plugged tires. Bought new Goodyears at Yukon's only Walmart and parts to repair a broken trailer slide mechanism at Home Hardware. The Home Hardware people even custom cut some scrap 1"x 4" at no charge for the cradle I designed for the slide motor. Can't say enough good things about the help we got in the Yukon, including Sue Thomas's posts on this forum.
However, I'm certainly glad it only took us 4 days for our repairs and sightseeing and not a month!