We are travelling from London, Ontario to North Conway, New Hampshire, pulling a 35' fifth wheel. Looking for the best/safest route to take through the mountains. One suggestion is crossing over at Buffalo and going down I90 to 7 to 91 to 116 and 112 which looks pretty windy in the Lincoln NH area. The other route, coming down from Quebec suggest Hwys 91 to 93 to 302. Any suggestions on which would would be best towing the 5th wheel would be appreciated. Thanks!