I have to second the Bristlecone Pine idea. A friend suggested it. He said it was a short drive off the main highway. Well, it was long and it was UP. It took a long time in our old camper van. I don't think hauling a trailer is recommended? The drive was worth it to see the ancient trees and to be able to hike around the area.
2012 17B, 2006 Toyota Tacoma V6