The Sonora Chapter has invited members of the Roadrunner Chapter to join them for a post-tax season trip to Williams. That will be the base to permit a train ride to the Grand Canyon. You will need to select and book your own tour package direct with the hotel/train folk.
More details are available on the Sonora Chapter web site:
Please also use the Register for Event! button above so that we know the Roadrunner Chapter members who are joining the trip.