Originally Posted by John Pacello
We would like to go to Whistler BC and East on Hwy 99 to Trans Canada 1.
Is the drive suitable for a 41Ft RV and a toad.
The highway to Whistler from Vancouver is an easy run. Going east of Whistler it is 2 lane most of the way. East of Pemberton you'll make a right hand turn at Mt. Currie and about 10 km on you'll come to a few switchbacks and you might wonder if its a great idea. Once you are at the top of that grade the road gets better and you will be fine.
I travel that road (Duffy Lake Road) once or twice per year on my motorcycle but being new to large motorhomes, I've not done it in my 43 ft'r yet. You'll have to take it a little slower at times but I don't believe you'll have any trouble as long as you take the right fork in the road at Lillooette. I don't recall seeing any big rigs during my rides other than some 45 ft tour busses. There are also many class C rentals.
At Lillooette you'll cross a bridge with a fork in the road on the east end. Turning left keeps you on Hwy-99, eventually T-boning Hwy-97 just north of Cache Creek. If you turn right, after Lillooett, onto Hwy-12, it intersects with Hwy-1 at Litton and then Hwy-1 will take you to Cache Creek. The stretch of Hwy-1 between Litton and Cache Creek is by far the best part of the Fraser Canyon BUT, don't take the Hwy-12 route in your motorhome. An uphill section has been reduced to a narrow one lane road due to slides and I would not want to try taking my coach through there.
Your timing is good. They just finished some heavy roadwork on the Duffy lake Road a couple of years ago and it would have been tough getting through with a big rig during the construction as they replaced most of the old wooden deck one-lane bridges with new concrete structures.
Also, be prepared for the heat around Lillooett in the summer. It is often the hottest spot in Canada occasionally topping 40 °C (104 °F).