"Ideal for solo travelers," says the press release from Western River Expeditions about its rafting trips on the Colorado River through Cataract Canyon, Utah. I vouch for that statement.
I had one of the best trips of my life floating on peaceful sections of the river and holding on for dear life through Class III and IV rapids (read: "big"). And camping by the side of the river with new friends who I was happy to spend every minute with.
These are professionally guided rafting trips with all meals and equipment provided. I call them "one-phone call" vacations because you sign up and then let the company do all the work of getting licenses, providing boats and setting out food.