Not long ago, a good friend shared with me her horror story of the travel companion from Hell! She had asked someone she knew casually in her hiking group to join her on a week-long Road Scholar Grand Canyon hiking trip. This travel companion made the trip miserable for my friend–very demanding, moody, rude, and inflexible with just about everything. After that trip, my friend said, “No more , never again will I invite someone I don’t know really well to travel with.” Fortunately, she has continued to travel solo and had some wonderful experiences. When we were younger, leisure travel was most often with a spouse/partner, children, or girl…