I've flown the big part of that trip in reverse, Wasilla to Vancouver in an MD500. I was mentored by a very experienced pilot, who knew the route, and alternates. Three of us flew back two machines, with Dan keeping an eye on both of us. We did it in late October, so short days, Day VFR only. Wasilla - Gakona - Tok - Beaver Creek (Yukon) - Whitehorse - Dease Lake - Bell 2 Lodge (truck stop with helipads and Jet fuel) - Stewart - Prince George - Lillooet - Vancouver. We wanted to fly the coast, but poor weather. Flying the Fraser river valley is a good route, not remote, and really nice scenery. Have an understanding of mountain flying before you do the trip. Take good survival gear, the north half of the trip is very remote, no matter which way you go!