How elderly? Are there limitations as to mobiity for this person? Can he or she walk, or stand. Wheelchair? mobility scooter? Walker?
When I visited Memphis, I was 68 years old and I didn't consider myself elderly and I was walking and not using a mobility scooter. We did a City sightseeing tour which was very comfortable and was very comprehensive, but I did have to climb a couple of steps to get on and off of the tour vehicle. We got off at the Peabody Hotel
to see the ducks come down the elevator, and we also got off at St Jude's Children's Research Hospital to visit the memorial to Danny Thomas and we got off in Beale Street
to have lunch. (We ate at Dyers and we walked down to Handy Park and looked at Schwab Drugstore) We could also have gotten off at Graceland
Later, we also rode the trolleycars around - ditto had to climb on and off and stand to transfer to the second line. That same day, we also visited the Memphis Botanical Garden