I am towing a 35 foot fifth wheel from La Vegas to San Juan Capistrano area (staying at Caspers Wilderness Area). I am concerned about whether rte 74 is big rig RV friendly. I have read things on some of the blogs concerning the switchbacks on this rte. If it not RV friendly can anyone suggest an alternative route. We are visiting California from Ohio on a 5 to 6 week trip. Calif. coast, Oregon, and Washington are also on our itinerary.Thanks.